fix: condition add ws

Author: ceelogre

beta_.conf

@@ -3,13 +3,19 @@ server {
     server_name  localhost;
 
     set $WS_BACKEND_URL ws://localhost:4000;
+    set $HTTP_BACKEND_URL http://localhost:4000;
 
     location / {
         root   /usr/share/nginx/html;
         index  index.html index.htm;
         try_files $uri /index.html;                 
 
-        proxy_pass $WS_BACKEND_URL;
+        set $backend $HTTP_BACKEND_URL;
+
+        if ($http_upgrade = 'websocket') {
+            set $backend $WS_BACKEND_URL
+        }
+        proxy_pass $backend;
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "Upgrade";