Matomo settings are not documented in the env.example

[almereyda]

The settings for #529 are documented only in the docker-compose.yml, but not referenced yet from the env.example.

For complete configuration, it is advisable to give usable examples for how these values need to look like.

I had successful configuration with the values:

MATOMO_ENDPOINT=https://matomo.example.com/
MATOMO_SITE_ID=666

taken from the page of a newly setup website in Matomo, for which no metrics were reported, yet.

[saghul]

I'd like to stop polluting env.example and move all settings to the handbook: https://jitsi.github.io/handbook/docs/devops-guide/devops-guide-docker#configuration

[almereyda]

Sounds rather good to me. Which other ENV vars could be omitted from the example, that are not strictly needed at first?

I'm immediately thinking of the Etherpad related ones #1200, and other optional and legacy configuration, like Let's Encrypt, LDAP, Jigasi and Jibri, HTTP redirect + HTTPS, IPv6. Basically everything that has a sane default, or is not included in the default distribution.

[saghul]

That'd be a good start indeed.