change endpoint for proxy

src/prometheus/metrics.gateway.ts

@@ -28,7 +28,7 @@ export class MetricsGateway implements OnModuleInit {
         const httpServer = createServer();
         this.wss = new Server({
             server: httpServer,
-            path: '/api/metrics-ws',
+            path: '/metrics-ws',
         });
 
         this.wss.on('connection', (client, request) =>