[home] Reintroduce nginx.conf.template (#628)

Allows env vars (PORT) in nginx conf

Author: Seburan

services/home/Dockerfile

@@ -14,14 +14,14 @@
 
 FROM nginx:1.27.5-alpine
 
+# Set the default output directory for templating
+ENV NGINX_ENVSUBST_OUTPUT_DIR=/etc/nginx
+
 # Copy custom Nginx configuration
-COPY --chown=nginx:nginx nginx.conf /etc/nginx/nginx.conf
+COPY --chown=nginx:nginx nginx.conf /etc/nginx/templates/nginx.conf.template
 
 # Copy built Docusaurus site from the buid folder
 COPY --chown=nginx:nginx build /usr/share/nginx/html
 
-# Nginx listens on 8080, expose it (for documentation/clarity)
-EXPOSE 8080
-
 # Start Nginx in the foreground
 CMD [ "nginx", "-g", "daemon off;" ]

services/home/nginx.conf

@@ -72,8 +72,8 @@ http {
     # ========= Server Block =========
     server {
         # Listen on the port specified by Cloud Run ($PORT), default is 8080
-        listen 8080 default_server;
-        listen [::]:8080 default_server;
+        listen ${PORT} default_server;
+        listen [::]:${PORT} default_server;
 
         # https://stackoverflow.com/questions/62648644/hosting-docusaurus-v2-using-nginx
         # prevent docusaurus to create a redirect to Cloud Run Endpoint or port 8080