* initdb command now requires explicit -U and -D flags
* acme-client now requires version v02 API endpoint
* Added step to add admin user, per other installation guides
* Corrected setup_db.psql path
I understand that this change is quite unreadable and hard to review, sorry for forgetting to do atomic commits. This patch does not change too much content wise, it just
* Gets everything from gitlab wiki
* Removes some specific gitlab hacks
* Formats all documentation file names to be in snake case so they look the same way as our code does
