Zimeng Xiong
23 lines
746 B
Bash
23 lines
746 B
Bash
#!/bin/sh
|
|
# Alpine-based image uses /bin/sh (busybox ash), not bash
|
|
set -e
|
|
|
|
# Set default backend URL if not provided (host:port format, no protocol)
|
|
export BACKEND_URL="${BACKEND_URL:-backend:8000}"
|
|
|
|
echo "Configuring nginx with BACKEND_URL: ${BACKEND_URL}"
|
|
|
|
# Substitute environment variables in nginx config template
|
|
# Only substitute BACKEND_URL, preserve nginx variables like $http_upgrade
|
|
envsubst '${BACKEND_URL}' < /etc/nginx/nginx.conf.template > /etc/nginx/nginx.conf
|
|
|
|
# Validate the generated nginx configuration before starting
|
|
echo "Validating nginx configuration..."
|
|
if ! nginx -t -c /etc/nginx/nginx.conf; then
|
|
echo "ERROR: nginx configuration validation failed" >&2
|
|
exit 1
|
|
fi
|
|
|
|
# Execute the main command (nginx)
|
|
exec "$@"
|