# ホスト名を変数経由にすると起動時の upstream 解決を避けられる（本番モード共存用）
        location / {
            set $vite_upstream frontend:5173;
            proxy_pass http://$vite_upstream;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;
            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;
        }