stable-4627: * fdf5030 prosody: update configuration

* afafe23 prosody: shrink container size
* 8e7ea34 base: fix setting timezone
* 58441ae doc: update README
* 3c12526 etherpad: update to version 1.8.4
* 0038e71 jibri: install extra dependency
* 0615ed6 doc: add missing volumes to quick start
* 2781865 doc: clarify usage of gen-passwords.sh
* a8d0b6c build: add PHONY target for "release"
* d4a35a6 misc: working on latest