Move our email reminders (e.g. for meetings) to Puppet

Originally created by @sajolida on #7763 (Redmine)

Our meeting reminder setup recipes should be generic, and live in the
(public) “tails” Puppet module, as a tails::meeting::reminder class,
I guess, that will install whatever is needed from Debian and from
your upstream Git repo (no, I won’t ask for a Debian package ;)

Then, most of the config can be public as well, and can live in the
very same module. If there are additional private config bits, then
we’ll put it into a dedicated private Puppet module.

See https://tails.boum.org/contribute/how/sysadmin/#index4h1 and
especially the “If you don’t know Puppet” subsection. Focus on “1. Prepare configuration, scripts and whatever is needed”.

Then, once we have this setup description info, intrigeri can translate it into Puppet.

Subtasks

• tails#8997 (closed)
• code of conduct
• monthly report
• reimbursements

Attachments

• lhf.yaml
• monthly.yaml
• code-of-conduct.eml
• monthly-report.eml
• reimbursements.eml

Related issues

• Related to #7899 (closed)
• Related to #14725 (closed)
• Related to tails#14507 (closed)