core (memory/params): set default resource priority to 0: Priority was historically set to 50 to follow behaviour of other clients at the time, but it's nowadays a legacy feature, and a non zero value can cause trouble if message carbon is not used.

version: "3.6"
services:

  prosody:
    image: libervia/prosody:demo
    build: prosody-demo

  backend:
    image: libervia/backend:dev-demo
    build: backend-dev-demo

  web:
    image: libervia/web:dev-demo
    build: libervia-web-dev-demo