mailu/docs
bors[bot] 238daef6d8
Merge
2295: Switch from Rainloop to SnappyMail r=mergify[bot] a=Diman0

## What type of PR?

Feature

## What does this PR do?
As discussed in the project meeting (), we decided we want to switch from Rainloop to an alternative. Rainloop has multiple open security issues which were not patched for a long time. 

We decided to switch to SnappyMail because it is more secure and based on RainLoop. This means that users using RainLoop will still have a webmail that looks familiar for them.

This PR replaces RainLoop with SnappyMail.

### Related issue(s)
-  
- 

## Prerequisites
Before we can consider review and merge, please make sure the following list is done and checked.
If an entry in not applicable, you can check it or remove it from the list.

- [x] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/workflow.html#changelog) entry file.


Co-authored-by: Dimitri Huisman <diman@huisman.xyz>
Co-authored-by: Florent Daigniere <nextgens@users.noreply.github.com>
..
_templates Restore VERSION_TAG template
assets removing unneeded image
compose Switch from RainLoop to SnappyMail
contributors Correct typo
kubernetes/mailu simplify
swarm Implement rate-limits
.env Add deploy settings for server
Dockerfile Process code review remarks
antispam.rst Add documentation for the web administration gui.
cli.rst Feature: Marking "Read" spam mails
conf.py Set language to English for sphinx in conf.py.
configuration.rst Merge
database.rst Remove Mailu PostgreSQL. Make roundcube database configurable via setup. Fix .
demo.rst Fixed small typo
dns.rst Change URL dashboard in DKIM/SPF & DMARC Entries
docker-compose.yml Make docker-compose.yml for setup and docs development friendly
faq.rst fix FAQ typo
features.rst remove service status "feature"
general.rst Fix the rst syntax for most documentation
index.rst document
maintain.rst Clarify that upgrades require a container restart
nginx.conf Build the documentation as a Docker image
releases.rst Warn about rollbacks not working
requirements.txt Added missing extension in conf.py. Added missing library in requirements.txt. Sphinx is only compatible with docutils<0.17
reverse.rst Adding missing semicolon after remote_addr
rpi_build.rst Update alpine version in rpi docs
setup.rst Preparations for 1.9 release.
webadministration.rst Added documentation for all user statuses.