fix: minio console nginx config (#13156)

docs/orchestration/docker-compose/nginx.conf

@@ -90,9 +90,12 @@ http {
             real_ip_header X-Real-IP;
 
             proxy_connect_timeout 300;
-            # Default is HTTP/1, keepalive is only enabled in HTTP/1.1
+            
+            # To support websocket
             proxy_http_version 1.1;
-            proxy_set_header Connection "";
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            
             chunked_transfer_encoding off;
 
             proxy_pass http://console;