Update nginx config and add Caddy2 support

- Fixed nginx.conf to proxy all API routes (/patches, /generate, /health, /docs)
- Changed frontend port to 3080 in docker-compose.yml
- Added Caddyfile for Caddy2 reverse proxy configuration
- Supports both FQDN and IP:port configurations

frontend/nginx.conf

@@ -16,7 +16,7 @@ server {
         try_files $uri $uri/ /index.html;
     }
 
-    # API proxy
+    # API proxy - proxy all API routes to backend
     location /projects {
         proxy_pass http://backend:8000;
         proxy_http_version 1.1;
@@ -35,6 +35,36 @@ server {
         proxy_cache_bypass $http_upgrade;
     }
 
+    location /patches {
+        proxy_pass http://backend:8000;
+        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;
+    }
+
+    location /generate {
+        proxy_pass http://backend:8000;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        proxy_set_header Host $host;
+        proxy_cache_bypass $http_upgrade;
+    }
+
+    location /health {
+        proxy_pass http://backend:8000;
+    }
+
+    location /docs {
+        proxy_pass http://backend:8000;
+    }
+
+    location /openapi.json {
+        proxy_pass http://backend:8000;
+    }
+
     # Cache static assets
     location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
         expires 1y;