Zimeng Xiong
23 lines
795 B
Bash
23 lines
795 B
Bash
#!/bin/sh
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# Alpine-based image uses /bin/sh (busybox ash), not bash
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set -e
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# Set default backend URL if not provided (host:port format, no protocol)
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export BACKEND_URL="${BACKEND_URL:-backend:8000}"
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echo "Configuring nginx with BACKEND_URL: ${BACKEND_URL}"
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# Replace only our custom placeholder and preserve nginx runtime vars like $http_upgrade
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ESCAPED_BACKEND_URL=$(printf '%s\n' "$BACKEND_URL" | sed 's/[\/&]/\\&/g')
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sed "s/__BACKEND_URL__/${ESCAPED_BACKEND_URL}/g" /etc/nginx/nginx.conf.template > /etc/nginx/nginx.conf
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# Validate the generated nginx configuration before starting
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echo "Validating nginx configuration..."
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if ! nginx -t -c /etc/nginx/nginx.conf; then
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echo "ERROR: nginx configuration validation failed" >&2
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exit 1
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fi
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# Execute the main command (nginx)
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exec "$@"
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