fix express proxy headers

Makefile

@@ -511,6 +511,17 @@ release-docker: ## Build and push release Docker images
 pre-release-docker: ## Build and push pre-release Docker images
 	./publish-docker-prerelease.sh
 
+dev-release: ## Build and push custom dev release (usage: make dev-release NAME=issue38)
+	@if [ -z "$(NAME)" ]; then \
+		echo "$(RED)ERROR: NAME parameter is required!$(NC)"; \
+		echo "$(YELLOW)Usage: make dev-release NAME=<custom-name>$(NC)"; \
+		echo "$(YELLOW)Example: make dev-release NAME=issue38$(NC)"; \
+		echo "$(YELLOW)  This will create tags like: 0.3.1-dev-issue38$(NC)"; \
+		exit 1; \
+	fi
+	@echo "$(BLUE)Building custom dev release: $(NAME)$(NC)"
+	@./publish-docker-dev.sh $(NAME)
+
 #===============================================================================
 # DATABASE
 #===============================================================================

backend/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "backend",
-  "version": "0.1.8",
+  "version": "0.3.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "backend",
-      "version": "0.1.8",
+      "version": "0.3.1",
       "license": "ISC",
       "dependencies": {
         "@prisma/client": "^5.22.0",
@@ -1128,7 +1128,6 @@
       "resolved": "https://registry.npmjs.org/@types/node/-/node-24.10.1.tgz",
       "integrity": "sha512-GNWcUTRBgIRJD5zj+Tq0fKOJ5XZajIiBroOF0yvj2bSU1WvNdYS/dn9UxwsujGW4JX06dnHyjV2y9rRaybH0iQ==",
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "undici-types": "~7.16.0"
       }
@@ -3814,7 +3813,6 @@
       "integrity": "sha512-vtpjW3XuYCSnMsNVBjLMNkTj6OZbudcPPTPYHqX0CJfpcdWciI1dM8uHETwmDxxiqEwCIE6WvXucWUetJgfu/A==",
       "hasInstallScript": true,
       "license": "Apache-2.0",
-      "peer": true,
       "dependencies": {
         "@prisma/engines": "5.22.0"
       },
@@ -4821,7 +4819,6 @@
       "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -4980,7 +4977,6 @@
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
       "license": "Apache-2.0",
-      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -5058,7 +5054,6 @@
       "integrity": "sha512-tI2l/nFHC5rLh7+5+o7QjKjSR04ivXDF4jcgV0f/bTQ+OJiITy5S6gaynVsEM+7RqzufMnVbIon6Sr5x1SDYaQ==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "dependencies": {
         "esbuild": "^0.25.0",
         "fdir": "^6.5.0",
@@ -5152,7 +5147,6 @@
       "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=12"
       },

backend/src/__tests__/csrf-trust-proxy.test.ts

@@ -0,0 +1,169 @@
+/**
+ * Issue #38: CSRF fails with multiple reverse proxies
+ *
+ * This test demonstrates how trust proxy settings affect CSRF validation
+ * when ExcaliDash is behind multiple proxy layers (e.g., Traefik, Synology NAS)
+ */
+
+import { describe, it, expect, beforeEach, afterEach } from "vitest";
+import express from "express";
+import request from "supertest";
+import {
+  createCsrfToken,
+  validateCsrfToken,
+  getCsrfTokenHeader,
+} from "../security";
+
+// mock the getClientId function behavior
+const getClientIdFromRequest = (req: express.Request): string => {
+  const ip = req.ip || req.connection.remoteAddress || "unknown";
+  const userAgent = req.headers["user-agent"] || "unknown";
+  return `${ip}:${userAgent}`.slice(0, 256);
+};
+
+describe("Issue #38: CSRF with trust proxy settings", () => {
+  let app: express.Application;
+
+  beforeEach(() => {
+    app = express();
+    app.use(express.json());
+  });
+
+  it("demonstrates the trust proxy issue with multiple proxies", async () => {
+    // ext proxy -> frontend nginx -> backend
+    // X-Forwarded-For: 203.0.113.42 (client), 10.0.0.5 (external proxy), 172.17.0.3 (frontend nginx)
+
+    // With trust proxy: 1 (current setting)
+    const app1 = express();
+    app1.set("trust proxy", 1);
+    app1.use(express.json());
+
+    app1.get("/test-ip", (req, res) => {
+      res.json({
+        ip: req.ip,
+        clientId: getClientIdFromRequest(req),
+      });
+    });
+
+    // Simulate request through multiple proxies
+    const response1 = await request(app1)
+      .get("/test-ip")
+      .set("X-Forwarded-For", "203.0.113.42, 10.0.0.5, 172.17.0.3")
+      .set("User-Agent", "Mozilla/5.0 Test");
+
+    // With trust proxy: 1, Express takes second-to-last IP (the external proxy)
+    expect(response1.body.ip).toBe("10.0.0.5");
+    console.log(
+      "trust proxy: 1 → IP:",
+      response1.body.ip,
+      "(external proxy IP - WRONG)",
+    );
+
+    // With trust proxy: true
+    const app2 = express();
+    app2.set("trust proxy", true);
+    app2.use(express.json());
+
+    app2.get("/test-ip", (req, res) => {
+      res.json({
+        ip: req.ip,
+        clientId: getClientIdFromRequest(req),
+      });
+    });
+
+    const response2 = await request(app2)
+      .get("/test-ip")
+      .set("X-Forwarded-For", "203.0.113.42, 10.0.0.5, 172.17.0.3")
+      .set("User-Agent", "Mozilla/5.0 Test");
+
+    // With trust proxy: true, Express takes leftmost IP
+    expect(response2.body.ip).toBe("203.0.113.42");
+    console.log(
+      "trust proxy: true → IP:",
+      response2.body.ip,
+      "(real client IP - CORRECT)",
+    );
+  });
+
+  it("simulates CSRF failure scenario from issue #38", async () => {
+    const userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64)";
+
+    // Request 1: Fetch CSRF token
+    // X-Forwarded-For shows: client, external-proxy-1, frontend-nginx
+    const clientIp1 = "203.0.113.42";
+    const externalProxyIp1 = "10.0.0.5"; // External proxy IP on first request
+
+    // With trust proxy: 1, Express sees the external proxy IP
+    const clientId1 = `${externalProxyIp1}:${userAgent}`;
+    const token = createCsrfToken(clientId1);
+
+    console.log(
+      "  X-Forwarded-For:",
+      `${clientIp1}, ${externalProxyIp1}, 172.17.0.3`,
+    );
+    console.log("  Express sees IP:", externalProxyIp1);
+    console.log("  ClientId:", clientId1.slice(0, 50) + "...");
+
+    // Request 2: Try to create drawing with token
+    // External proxy IP might differ slightly
+    const externalProxyIp2 = "10.0.0.6";
+
+    const clientId2 = `${externalProxyIp2}:${userAgent}`;
+
+    console.log(
+      "  X-Forwarded-For:",
+      `${clientIp1}, ${externalProxyIp2}, 172.17.0.3`,
+    );
+    console.log("  Express sees IP:", externalProxyIp2);
+    console.log("  ClientId:", clientId2.slice(0, 50) + "...");
+
+    // CSRF validation fails because clientId changed
+    const isValid = validateCsrfToken(clientId2, token);
+
+    expect(isValid).toBe(false);
+    console.log("   Expected:", clientId1.slice(0, 50) + "...");
+    console.log("   Got:", clientId2.slice(0, 50) + "...");
+  });
+
+  it("shows the fix works with trust proxy: true", async () => {
+    const userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64)";
+    const realClientIp = "203.0.113.42";
+
+    const clientId1 = `${realClientIp}:${userAgent}`;
+    const token = createCsrfToken(clientId1);
+
+    console.log("  X-Forwarded-For:", `${realClientIp}, 10.0.0.5, 172.17.0.3`);
+    console.log("  Express sees IP:", realClientIp);
+
+    // Request 2: Use token (even if middle proxy IPs differ)
+    const clientId2 = `${realClientIp}:${userAgent}`;
+
+    console.log("Create drawing");
+    console.log("X-Forwarded-For:", `${realClientIp}, 10.0.0.6, 172.17.0.3`);
+    console.log("Express sees IP:", realClientIp, "(same!)");
+
+    const isValid = validateCsrfToken(clientId2, token);
+
+    expect(isValid).toBe(true);
+    console.log("\nCSRF Validation: SUCCESS");
+  });
+
+  it("demonstrates the Synology NAS scenario from issue #38", async () => {
+    const app = express();
+    app.set("trust proxy", 1);
+    app.use(express.json());
+
+    let seenIp: string | undefined;
+    app.get("/test", (req, res) => {
+      seenIp = req.ip;
+      res.json({ ip: req.ip });
+    });
+
+    // Client -> Synology (192.168.1.x) -> Docker frontend (192.168.11.x) -> Backend
+    await request(app)
+      .get("/test")
+      .set("X-Forwarded-For", "192.168.0.100, 192.168.1.4, 192.168.11.166");
+    console.log("  With trust proxy: 1, Express sees:", seenIp);
+    expect(seenIp).toBe("192.168.1.4"); // Proxy IP, not client IP
+  });
+});

backend/src/index.ts

@@ -132,8 +132,21 @@ const app = express();
 
 // Trust proxy headers (X-Forwarded-For, X-Real-IP) from nginx
 // Required for correct client IP detection when running behind a reverse proxy
-// This fixes CSRF token validation failures in Docker/K8s environments
+// Fix for issue #38: Use 'true' to handle multiple proxy layers (e.g., Traefik, Synology NAS)
-app.set("trust proxy", 1);
+// This ensures Express extracts the real client IP from the leftmost X-Forwarded-For value
+const trustProxyConfig = process.env.TRUST_PROXY || "true";
+const trustProxyValue = trustProxyConfig === "true"
+  ? true
+  : trustProxyConfig === "false"
+  ? false
+  : parseInt(trustProxyConfig, 10) || 1;
+app.set("trust proxy", trustProxyValue);
+
+if (trustProxyValue === true) {
+  console.log("[config] trust proxy: enabled (handles multiple proxy layers)");
+} else {
+  console.log(`[config] trust proxy: ${trustProxyValue}`);
+}
 
 const httpServer = createServer(app);
 const io = new Server(httpServer, {
@@ -330,9 +343,24 @@ app.use((req, res, next) => {
 const getClientId = (req: express.Request): string => {
   const ip = req.ip || req.connection.remoteAddress || "unknown";
   const userAgent = req.headers["user-agent"] || "unknown";
-  // Create a simple hash for client identification
+  const clientId = `${ip}:${userAgent}`.slice(0, 256);
-  // In production, you might use a session ID instead
+
-  return `${ip}:${userAgent}`.slice(0, 256);
+  // Debug logging for CSRF troubleshooting (issue #38)
+  if (process.env.DEBUG_CSRF === "true") {
+    console.log("[CSRF DEBUG] getClientId", {
+      method: req.method,
+      path: req.path,
+      ip,
+      remoteAddress: req.connection.remoteAddress,
+      "x-forwarded-for": req.headers["x-forwarded-for"],
+      "x-real-ip": req.headers["x-real-ip"],
+      userAgent: userAgent.slice(0, 100),
+      clientIdPreview: clientId.slice(0, 60) + "...",
+      trustProxySetting: req.app.get("trust proxy"),
+    });
+  }
+
+  return clientId;
 };
 
 // Rate limiter specifically for CSRF token generation to prevent store exhaustion

backend/src/security.ts

@@ -569,8 +569,12 @@ const getCsrfSecret = (): Buffer => {
   cachedCsrfSecret = crypto.randomBytes(32);
   const envLabel = process.env.NODE_ENV ? ` (${process.env.NODE_ENV})` : "";
   console.warn(
-    `[security] CSRF_SECRET is not set${envLabel}. Using an ephemeral per-process secret. ` +
+    `[SECURITY WARNING] CSRF_SECRET is not set${envLabel}.\n` +
-    "For horizontal scaling (k8s), set CSRF_SECRET to the same value on all instances."
+    `Using an ephemeral per-process secret.\n` +
+    `  - Tokens will expire on container restart\n` +
+    `  - Horizontal scaling (k8s) will NOT work\n` +
+    `  - Generate a secret: openssl rand -base64 32\n` +
+    `  - Set environment variable: CSRF_SECRET=<generated-secret>`
   );
   return cachedCsrfSecret;
 };

frontend/package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "frontend",
-  "version": "0.3.1",
+  "version": "0.1.8",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "frontend",
-      "version": "0.3.1",
+      "version": "0.1.8",
       "dependencies": {
         "@dnd-kit/core": "^6.3.1",
         "@dnd-kit/utilities": "^3.2.2",
@@ -15,7 +15,7 @@
         "axios": "^1.13.2",
         "clsx": "^2.1.1",
         "date-fns": "^4.1.0",
-        "lodash": "^4.17.23",
+        "lodash": "^4.17.21",
         "lucide-react": "^0.554.0",
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
@@ -162,6 +162,7 @@
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       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@babel/code-frame": "^7.27.1",
         "@babel/generator": "^7.28.5",
@@ -516,6 +517,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=18"
       },
@@ -559,6 +561,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=18"
       }
@@ -2609,8 +2612,7 @@
       "resolved": "https://registry.npmjs.org/@types/aria-query/-/aria-query-5.0.4.tgz",
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       "dev": true,
-      "license": "MIT",
+      "license": "MIT"
-      "peer": true
     },
     "node_modules/@types/babel__core": {
       "version": "7.20.5",
@@ -2775,6 +2777,7 @@
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       "devOptional": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@types/prop-types": "*",
         "csstype": "^3.0.2"
@@ -2786,6 +2789,7 @@
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       "devOptional": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@types/react": "*"
       }
@@ -2856,6 +2860,7 @@
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       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@typescript-eslint/scope-manager": "8.47.0",
         "@typescript-eslint/types": "8.47.0",
@@ -3219,6 +3224,7 @@
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       "dev": true,
       "license": "MIT",
+      "peer": true,
       "bin": {
         "acorn": "bin/acorn"
       },
@@ -3269,7 +3275,6 @@
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       "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=8"
       }
@@ -3499,6 +3504,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "baseline-browser-mapping": "^2.8.25",
         "caniuse-lite": "^1.0.30001754",
@@ -3830,6 +3836,7 @@
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       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=0.10"
       }
@@ -4203,6 +4210,7 @@
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       "license": "ISC",
+      "peer": true,
       "engines": {
         "node": ">=12"
       }
@@ -4442,8 +4450,7 @@
       "resolved": "https://registry.npmjs.org/dom-accessibility-api/-/dom-accessibility-api-0.5.16.tgz",
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       "dev": true,
-      "license": "MIT",
+      "license": "MIT"
-      "peer": true
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     "node_modules/dompurify": {
       "version": "3.1.6",
@@ -4662,6 +4669,7 @@
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       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@eslint-community/eslint-utils": "^4.8.0",
         "@eslint-community/regexpp": "^4.12.1",
@@ -5495,6 +5503,7 @@
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       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12.20.0"
       },
@@ -5775,9 +5784,9 @@
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     },
     "node_modules/lodash": {
-      "version": "4.17.23",
+      "version": "4.17.21",
-      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.23.tgz",
+      "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
-      "integrity": "sha512-LgVTMpQtIopCi79SJeDiP0TfWi5CNEc/L/aRdTh3yIvmZXTnheWpKjSZhnvMl8iXbC1tFg9gdHHDMLoV7CnG+w==",
+      "integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
       "license": "MIT"
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@@ -5842,7 +5851,6 @@
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       "dev": true,
       "license": "MIT",
-      "peer": true,
       "bin": {
         "lz-string": "bin/bin.js"
       }
@@ -6872,6 +6880,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "nanoid": "^3.3.7",
         "picocolors": "^1.0.0",
@@ -7037,7 +7046,6 @@
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       "dev": true,
       "license": "MIT",
-      "peer": true,
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@@ -7053,7 +7061,6 @@
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       "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
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@@ -7109,6 +7116,7 @@
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       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "loose-envify": "^1.1.0"
       },
@@ -7121,6 +7129,7 @@
       "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-18.3.1.tgz",
       "integrity": "sha512-5m4nQKp+rZRb09LNH59GM4BxTh9251/ylbKIbpe7TpGxfJ+9kv6BLkLBXIjjspbgbnIBNqlI23tRnTWT0snUIw==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "loose-envify": "^1.1.0",
         "scheduler": "^0.23.2"
@@ -7134,8 +7143,7 @@
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-17.0.2.tgz",
       "integrity": "sha512-w2GsyukL62IJnlaff/nRegPQR94C/XXamvMWmSHRJ4y7Ts/4ocGRmTHvOs8PSE6pB3dWOrD/nueuU5sduBsQ4w==",
       "dev": true,
-      "license": "MIT",
+      "license": "MIT"
-      "peer": true
     },
     "node_modules/react-refresh": {
       "version": "0.18.0",
@@ -7850,6 +7858,7 @@
       "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -7988,6 +7997,7 @@
       "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
       "dev": true,
       "license": "Apache-2.0",
+      "peer": true,
       "bin": {
         "tsc": "bin/tsc",
         "tsserver": "bin/tsserver"
@@ -8177,6 +8187,7 @@
       "integrity": "sha512-BxAKBWmIbrDgrokdGZH1IgkIk/5mMHDreLDmCJ0qpyJaAteP8NvMhkwr/ZCQNqNH97bw/dANTE9PDzqwJghfMQ==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "esbuild": "^0.25.0",
         "fdir": "^6.5.0",
@@ -8270,6 +8281,7 @@
       "integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=12"
       },
@@ -8596,6 +8608,7 @@
       "integrity": "sha512-JInaHOamG8pt5+Ey8kGmdcAcg3OL9reK8ltczgHTAwNhMys/6ThXHityHxVV2p3fkw/c+MAvBHFVYHFZDmjMCQ==",
       "dev": true,
       "license": "MIT",
+      "peer": true,
       "funding": {
         "url": "https://github.com/sponsors/colinhacks"
       }

frontend/package.json

@@ -22,7 +22,7 @@
     "axios": "^1.13.2",
     "clsx": "^2.1.1",
     "date-fns": "^4.1.0",
-    "lodash": "^4.17.23",
+    "lodash": "^4.17.21",
     "lucide-react": "^0.554.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",

publish-docker-dev.sh

@@ -0,0 +1,109 @@
+#!/bin/bash
+set -e
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+# Custom name is required
+CUSTOM_NAME=$1
+
+if [ -z "$CUSTOM_NAME" ]; then
+    echo -e "${RED}ERROR: Custom name is required!${NC}"
+    echo -e "${YELLOW}Usage: $0 <custom-name>${NC}"
+    echo -e "${YELLOW}Example: $0 issue38${NC}"
+    echo -e "${YELLOW}  This will create tags like: 0.3.1-dev-issue38${NC}"
+    exit 1
+fi
+
+# Configuration
+DOCKER_USERNAME="zimengxiong"
+IMAGE_NAME="excalidash"
+BASE_VERSION=$(node -e "try { console.log(require('fs').readFileSync('VERSION', 'utf8').trim()) } catch { console.log('0.0.0') }")
+VERSION="${BASE_VERSION}-dev-${CUSTOM_NAME}"
+CURRENT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+
+echo -e "${BLUE}===========================================${NC}"
+echo -e "${BLUE}ExcaliDash Custom Dev Release${NC}"
+echo -e "${BLUE}===========================================${NC}"
+echo ""
+echo -e "${YELLOW}Branch:       ${CURRENT_BRANCH}${NC}"
+echo -e "${YELLOW}Base version: ${BASE_VERSION}${NC}"
+echo -e "${YELLOW}Custom name:  ${CUSTOM_NAME}${NC}"
+echo -e "${YELLOW}Full tag:     ${VERSION}${NC}"
+echo ""
+echo -e "${YELLOW}This will publish images with tag: ${VERSION}${NC}"
+echo -e "${YELLOW}Dev images will NOT update 'latest' or 'dev' tags${NC}"
+echo ""
+
+# Confirm before proceeding
+read -p "Continue? (y/N) " -n 1 -r
+echo
+if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+    echo -e "${RED}Aborted.${NC}"
+    exit 1
+fi
+
+# Check if logged in to Docker Hub
+echo -e "${YELLOW}Checking Docker Hub authentication...${NC}"
+if ! docker info | grep -q "Username: $DOCKER_USERNAME"; then
+    echo -e "${YELLOW}Not logged in. Please login to Docker Hub:${NC}"
+    docker login
+else
+    echo -e "${GREEN}✓ Already logged in as $DOCKER_USERNAME${NC}"
+fi
+
+# Create buildx builder if it doesn't exist
+echo -e "${YELLOW}Setting up buildx builder...${NC}"
+if ! docker buildx inspect excalidash-builder > /dev/null 2>&1; then
+    echo -e "${YELLOW}Creating new buildx builder...${NC}"
+    docker buildx create --name excalidash-builder --use --bootstrap
+else
+    echo -e "${GREEN}✓ Using existing buildx builder${NC}"
+    docker buildx use excalidash-builder
+fi
+
+# Build and push backend image
+echo ""
+echo -e "${BLUE}Building and pushing backend image...${NC}"
+docker buildx build \
+    --platform linux/amd64,linux/arm64 \
+    --tag $DOCKER_USERNAME/$IMAGE_NAME-backend:$VERSION \
+    --file backend/Dockerfile \
+    --push \
+    backend/
+
+echo -e "${GREEN}✓ Backend image pushed successfully${NC}"
+
+# Build and push frontend image
+echo ""
+echo -e "${BLUE}Building and pushing frontend image...${NC}"
+docker buildx build \
+    --platform linux/amd64,linux/arm64 \
+    --tag $DOCKER_USERNAME/$IMAGE_NAME-frontend:$VERSION \
+    --build-arg VITE_APP_VERSION=$VERSION \
+    --file frontend/Dockerfile \
+    --push \
+    .
+
+echo -e "${GREEN}✓ Frontend image pushed successfully${NC}"
+
+echo ""
+echo -e "${BLUE}===========================================${NC}"
+echo -e "${GREEN}✓ Custom dev images published!${NC}"
+echo -e "${BLUE}===========================================${NC}"
+echo ""
+echo -e "${YELLOW}Images published:${NC}"
+echo -e "  • $DOCKER_USERNAME/$IMAGE_NAME-backend:$VERSION"
+echo -e "  • $DOCKER_USERNAME/$IMAGE_NAME-frontend:$VERSION"
+echo ""
+echo -e "${YELLOW}To use these images in docker-compose:${NC}"
+echo -e "${BLUE}  services:"
+echo -e "    backend:"
+echo -e "      image: $DOCKER_USERNAME/$IMAGE_NAME-backend:$VERSION"
+echo -e "    frontend:"
+echo -e "      image: $DOCKER_USERNAME/$IMAGE_NAME-frontend:$VERSION${NC}"
+echo ""