docs: enterprise refactor plan with ralph specs

frontend/nginx.conf

@@ -0,0 +1,28 @@
+server {
+    listen 80;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Single-page application fallback
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    # Proxy REST API to the backend service
+    location /api/ {
+        proxy_pass http://backend:3001;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+    }
+
+    # Proxy socket.io with WebSocket upgrade support
+    location /socket.io/ {
+        proxy_pass http://backend:3001;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        proxy_set_header Host $host;
+    }
+}