template to add env variables

docker-compose.local.yaml

@@ -63,6 +63,12 @@ services:
     networks:
       - quiz_network
     restart: always
+    #environment:
+    #  - PORT=8000
+    #  - FRONTEND_HOST=frontend
+    #  - FRONTEND_PORT=5173
+    #  - BACKEND_HOST=backend
+    #  - BACKEND_PORT=3000
 
   mongo:
     image: mongo

nginx/.env.example

@@ -0,0 +1,5 @@
+PORT=80
+FRONTEND_HOST=frontend
+FRONTEND_PORT=5173
+BACKEND_HOST=backend
+BACKEND_PORT=3000

nginx/Dockerfile

@@ -1,20 +1,16 @@
 # Stage 1: Build stage
 FROM nginx:1.27-alpine AS builder
-
 # Install required packages
 RUN apk add --no-cache nginx-mod-http-js nginx-mod-http-keyval
 
 # Stage 2: Final stage
 FROM alpine:3.19
 
-# Copy Nginx and NJS modules from builder
-COPY --from=builder /usr/sbin/nginx /usr/sbin/
-COPY --from=builder /usr/lib/nginx/modules/ /usr/lib/nginx/modules/
-COPY --from=builder /etc/nginx/ /etc/nginx/
-COPY --from=builder /usr/lib/nginx/ /usr/lib/nginx/
-
-# Install required runtime dependencies
+# Install gettext for envsubst and other dependencies
 RUN apk add --no-cache \
+    gettext \
+    nginx-mod-http-js \
+    nginx-mod-http-keyval \
     pcre2 \
     ca-certificates \
     pcre \
@@ -24,15 +20,30 @@ RUN apk add --no-cache \
     libxml2 \
     libedit \
     geoip \
-    libxslt \
-    && mkdir -p /var/cache/nginx \
+    libxslt
+
+# Create base nginx directory
+RUN mkdir -p /etc/nginx
+
+# Copy Nginx and NJS modules from builder
+COPY --from=builder /usr/sbin/nginx /usr/sbin/
+COPY --from=builder /usr/lib/nginx/modules/ /usr/lib/nginx/modules/
+RUN rm -rf /etc/nginx/*
+COPY --from=builder /etc/nginx/ /etc/nginx/
+COPY --from=builder /usr/lib/nginx/ /usr/lib/nginx/
+
+# Setup directories and permissions
+RUN mkdir -p /var/cache/nginx \
     && mkdir -p /var/log/nginx \
     && mkdir -p /etc/nginx/conf.d \
     && mkdir -p /etc/nginx/njs \
-    && ln -sf /dev/stdout /var/log/nginx/access.log \
-    && ln -sf /dev/stderr /var/log/nginx/error.log \
-    && addgroup -S nginx \
-    && adduser -D -S -h /var/cache/nginx -s /sbin/nologin -G nginx nginx
+    && mkdir -p /etc/nginx/templates \
+    && chown -R nginx:nginx /var/cache/nginx \
+    && chown -R nginx:nginx /var/log/nginx \
+    && chown -R nginx:nginx /etc/nginx \
+    && touch /var/run/nginx.pid \
+    && chown nginx:nginx /var/run/nginx.pid \
+    && chmod 777 /var/log/nginx
 
 # Copy necessary libraries from builder
 COPY --from=builder /usr/lib/libxml2.so* /usr/lib/
@@ -45,25 +56,29 @@ RUN echo 'load_module modules/ngx_http_js_module.so;' > /tmp/nginx.conf && \
     cat /etc/nginx/nginx.conf >> /tmp/nginx.conf && \
     mv /tmp/nginx.conf /etc/nginx/nginx.conf
 
-# Copy our configuration
-COPY conf.d/default.conf /etc/nginx/conf.d/
+# Copy configurations
+COPY templates/default.conf /etc/nginx/templates/
 COPY njs/main.js /etc/nginx/njs/
+COPY entrypoint.sh /entrypoint.sh
 
-# Set proper permissions
-RUN chown -R nginx:nginx /var/cache/nginx \
-    && chown -R nginx:nginx /var/log/nginx \
-    && chown -R nginx:nginx /etc/nginx/conf.d \
-    && touch /var/run/nginx.pid \
-    && chown -R nginx:nginx /var/run/nginx.pid
+ENV PORT=80 \
+    FRONTEND_HOST=frontend \
+    FRONTEND_PORT=5173 \
+    BACKEND_HOST=backend \
+    BACKEND_PORT=3000
 
-# Verify the configuration
-# RUN nginx -t --dry-run
+# Set final permissions
+RUN chmod +x /entrypoint.sh && \
+    chown -R nginx:nginx /etc/nginx && \
+    chown -R nginx:nginx /var/log/nginx && \
+    chown -R nginx:nginx /var/cache/nginx && \
+    chmod 755 /etc/nginx && \
+    chmod 777 /etc/nginx/conf.d && \
+    chmod 644 /etc/nginx/templates/default.conf && \
+    chmod 644 /etc/nginx/conf.d/default.conf
 
-# Switch to non-root user
+# Switch to nginx user
 USER nginx
 
-# Expose HTTP port
-EXPOSE 80
-
-# Start Nginx
-CMD ["nginx", "-g", "daemon off;"]
+# Start Nginx using entrypoint script
+ENTRYPOINT ["/entrypoint.sh"]

nginx/entrypoint.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+# entrypoint.sh
+
+# We are already running as nginx user
+envsubst '${PORT} ${FRONTEND_HOST} ${FRONTEND_PORT} ${BACKEND_HOST} ${BACKEND_PORT}' \
+    < /etc/nginx/templates/default.conf \
+    > /etc/nginx/conf.d/default.conf
+
+# Start nginx
+exec nginx -g "daemon off;"

nginx/templates/default.conf

@@ -8,15 +8,15 @@ map $http_upgrade $connection_upgrade {
 }
 
 upstream frontend {
-    server frontend:5173;
+    server ${FRONTEND_HOST}:${FRONTEND_PORT};
 }
 
 upstream backend {
-    server backend:3000;
+    server ${BACKEND_HOST}:${BACKEND_PORT};
 }
 
 server {
-    listen 80;
+    listen ${PORT};
     
     set $proxy_target "";