fix URLs

frontend/nginx.conf

@@ -65,6 +65,16 @@ http {
             add_header Content-Type text/plain;
         }
 
+        # Proxy API requests to backend
+        location /api/ {
+            proxy_pass http://backend:3000;
+            proxy_http_version 1.1;
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+        }
+
         # Cache static assets
         location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
             expires 1y;