Update nginx config to route /api/qr-code/ to frontend (port 3800)

nginx-host.conf

@@ -86,6 +86,37 @@ server {
         }
     }
 
+    # === Next.js Frontend QR Code API ===
+    # NOTE: This MUST come before the general /api/ backend location block
+    location /api/qr-code/ {
+        proxy_pass         http://127.0.0.1:3800;
+        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 $scheme;
+
+        # CORS headers
+        add_header Access-Control-Allow-Origin '*' always;
+        add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS' always;
+        add_header Access-Control-Allow-Headers 'Content-Type, Authorization' always;
+
+        # API timeouts
+        proxy_read_timeout 120;
+        proxy_connect_timeout 120;
+        proxy_send_timeout 120;
+
+        # Handle OPTIONS for CORS preflight
+        if ($request_method = 'OPTIONS') {
+            add_header Access-Control-Allow-Origin '*';
+            add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
+            add_header Access-Control-Allow-Headers 'Content-Type, Authorization';
+            add_header Access-Control-Max-Age 1728000;
+            add_header Content-Length 0;
+            return 204;
+        }
+    }
+
     # === Backend API - Stripe Webhooks (specific route, no trailing slash) ===
     location = /api/webhooks/stripe {
         proxy_pass         http://127.0.0.1:3801/api/webhooks/stripe;