fix: restore api proxy for Coolify, remove ports, use expose

docker-compose.yml

@@ -1,8 +1,8 @@
 services:
   backend:
     build: ./backend
-    ports:
-      - "${BACKEND_PORT:-3001}:3001"
+    expose:
+      - 3001
     env_file:
       - .env
     environment:
@@ -14,8 +14,8 @@ services:
       context: ./frontend
       args:
         - VITE_API_URL=/api
-    ports:
-      - "${FRONTEND_PORT:-8080}:80"
+    expose:
+      - 80
     depends_on:
       - backend
     restart: unless-stopped

frontend/nginx.conf

@@ -7,4 +7,13 @@ server {
     location / {
         try_files $uri $uri/ /index.html;
     }
+
+    location /api/ {
+        proxy_pass http://backend:3001/api/;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_cache_bypass $http_upgrade;
+    }
 }