fix nginx api proxy path

z2/nginx/nginx.conf

@@ -53,7 +53,7 @@ http {
             try_files $uri $uri/ /index.html;
         }
         location /api/ {
-            proxy_pass http://backend;
+            proxy_pass http://backend/;
             proxy_set_header Host $host;
             proxy_set_header X-Real-IP $remote_addr;
             proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;