fix(infra) : update proxy port to 8086 and add maintenance mode

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

infra/prod/Dockerfile

@@ -68,6 +68,9 @@ COPY --from=backend-build /app /var/www/html
 # Frontend from stage 2
 COPY --from=frontend-build /app/frontend/.output/public /var/www/html/frontend/.output/public
 
+# Maintenance page
+COPY infra/prod/maintenance.html /var/www/html/public/maintenance.html
+
 # Symfony needs a .env file to boot (variables are overridden by env_file in docker-compose)
 RUN echo "APP_ENV=prod" > /var/www/html/.env
 

infra/prod/nginx-proxy.conf

@@ -21,7 +21,7 @@ server {
     }
 
     location / {
-        proxy_pass http://127.0.0.1:8083;
+        proxy_pass http://127.0.0.1:8086;
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

infra/prod/nginx.conf

@@ -10,6 +10,16 @@ server {
     access_log /dev/stdout;
     error_log /dev/stderr;
 
+    # Mode maintenance : créer /var/www/html/maintenance.on pour activer
+    if (-f /var/www/html/maintenance.on) {
+        return 503;
+    }
+    error_page 503 @maintenance;
+    location @maintenance {
+        root /var/www/html/public;
+        rewrite ^(.*)$ /maintenance.html break;
+    }
+
     location ^~ /api/ {
         root /var/www/html/public;
         try_files $uri /index.php?$query_string;