Docker install uses localhost as ws endpoint despite having it set to something else

Hi, I installed xmpp-web using the provided docker-compose file, and replacting the host port in it with 8086 and proxying it through nginx, I'm not sure which websocket url I am supposed to provide in XMPP_WS so I assumed it's my XMPP server's but it looks like it's not updating it at all and it just uses localhost regardless of what I put here. My docker-compose.yml looks like this

version: "3.4"
services:
  xmpp-web:
    image: nioc/xmpp-web:latest
    ports:
      - "8086:80"
    environment:
      - XMPP_WS=https://chat.catboy.baby/xmpp-websocket
      - APP_DEFAULT_DOMAIN=chat.catboy.baby

And my nginx config looks like this:

server {
  listen 443 ssl;
  ssl_certificate /etc/letsencrypt/live/catboy.baby-0001/fullchain.pem;
  ssl_certificate_key /etc/letsencrypt/live/catboy.baby-0001/privkey.pem;

  server_name web.chat.catboy.baby;

  location / {
      proxy_pass http://127.0.0.1:8086;
      proxy_set_header Host $host;
      proxy_http_version 1.1;
      proxy_redirect off;

      # For WebSocket
      proxy_set_header Upgrade $http_upgrade;
      proxy_set_header Connection $connection_upgrade;
  }
}

This is the error I'm getting in the Firefox console:

Can I get some help please? 🥺 If you want to have a look yourselves, it's over at https://web.chat.catboy.baby and the ws endpoint is https://chat.catboy.baby/xmpp-websocket

nioc / xmpp-web

Docker install uses localhost as ws endpoint despite having it set to something else #114