Update docs and remove cruft
Updated the docs and tested on buster and bullseye.
- The apache test configs were out of date and full of things that were not used anymore like mod_perl. It was also very much different from the
production
one. Tried to make it to match the production one and removed all cruft from it. - Updated the docs and moved local testing to a separate section.
- Documented some weird behavior
- Tested the new instructions on buster and bullseye; made sure that the local testing instructions were as easy to follow as possible