Implement server-side order persistence with SQLite and Flask API

nginx.conf

@@ -32,6 +32,18 @@ http {
             proxy_read_timeout 5s;
         }
 
+        # Order service API - forwards to order-service
+        location /api/order {
+            proxy_pass http://order-service:8082$request_uri;
+            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 Content-Type application/json;
+            proxy_connect_timeout 3s;
+            proxy_read_timeout 5s;
+        }
+
         # Serve static files
         location / {
             root   /usr/share/nginx/html;