Description

I removed many parts of the README and placed them inside the docs. This is done to ensure we can properly version all of out documentation. I believe that users should generally always use our documentation, not a mixture of README + docs, to configure and check their mail server. This makes maintenance easier for maintainers, and changes are local to the version. Previously, we had to keep the README and docs in sync, which is undesirable.

I took many parts of the README and copy-pasted it into the docs. Other parts were slightly adjusted to match the context. The landing page of our docs was more heavily refactored and updated to display more information.

I also added notes on the versioning of the docs!

There is actually more work to do in cleaning up parts of the docs (a section in the examples chapter needs overhaul, etc.). But I did want to make this PR bigger - it is big enough.

@polarathene please, by all means, go ahead and apply suggested changes immediately without waiting for me. I'd only just apply them anyway :) This way we can make reviewing faster. I hope you think the changes a worthwhile.

Type of change

• Improvement (non-breaking change that does improve existing functionality)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (README.md or the documentation under docs/)