Question websocket ratchet on plesk

[johill]

Server operating system version

Ubuntu 22.04.3 LTS

Plesk version and microupdate number

Version 18.0.56 Update #4

hi,

i would like to install a websocket (ratchet) on my plesk server.
There are some threads, but none helped.
It seems for me (i am absolute beginner) there are problems with nginx.
My php program for socketstart is running from terminal without error, also without success...
Browser shows failure in wss connection.
Does anyone know a tutorial/script to show me the right way?

my nginx-addon. i put the mark at proxy off.;

location /app {
proxy_pass http://85.215.60.52:8080;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
}

regards
johill