I'm a fairly experienced sysadmin/dev and seeing this on their Docker image instructions means I likely won't bother if I have to set things up distinct from their Docker (hint: I'm looking at your Docker instructions because I want a nice simple self-contained build):

> Running this docker-compose file will build a stack comprising an nginx container, a PHP container (where Movim itself resides) and a PostgreSQL container. This setup assumes that you already have an XMPP server such as ejabberd or Prosody running somewhere else.