Ensure timezone/time data is synced in docker
Especially in app containers, because this can affect the verification of HTTP signatures and break federation.
cc @OniriCorpe
One way to do that could be to add the following volumes to our sample docker-compose.yml, for each service:
volumes:
- "/etc/timezone:/etc/timezone:ro"
- "/etc/localtime:/etc/localtime:ro"
And update our mono-container installation guide to include those volumes as well: -v /etc/timezone:/etc/timezone:ro -v /etc/localtime:/etc/localtime:ro