adding backend port env var to nginx

nginx/Dockerfile

@@ -12,6 +12,7 @@ RUN apt-get update && apt-get install -y gettext-base
 
 # Replace variables at build time
 ENV BACKEND_HOST=backend
+ENV BACKEND_PORT=8080
 ENV DOMAIN=example.com
 
 ENTRYPOINT ["/entrypoint.sh"]

nginx/entrypoint.sh

@@ -4,10 +4,10 @@ set -e
 # Check if certificate exists
 if [ -f "/etc/letsencrypt/live/$DOMAIN/fullchain.pem" ] && [ -f "/etc/letsencrypt/live/$DOMAIN/privkey.pem" ]; then
     echo "Certificates found. Using production nginx config."
-    envsubst '$BACKEND_HOST $DOMAIN' < /etc/nginx/nginx.conf.template > /etc/nginx/nginx.conf
+    envsubst '$BACKEND_HOST $BACKEND_PORT $DOMAIN' < /etc/nginx/nginx.conf.template > /etc/nginx/nginx.conf
 else
     echo "Certificates NOT found. Using setup nginx config."
-    envsubst '$BACKEND_HOST $DOMAIN' < /etc/nginx/nginx_setup.conf.template > /etc/nginx/nginx.conf
+    envsubst '$BACKEND_HOST $BACKEND_PORT $DOMAIN' < /etc/nginx/nginx_setup.conf.template > /etc/nginx/nginx.conf
 fi
 
 # Start nginx

nginx/nginx.conf.template

@@ -49,7 +49,7 @@ http {
         }
 
         location /posts/ {
-            proxy_pass http://$BACKEND_HOST:8080/posts;
+            proxy_pass http://$BACKEND_HOST:$BACKEND_PORT/posts;
             proxy_set_header Host $host;
             proxy_set_header X-Real-IP $remote_addr;
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;