Based on: #21462
Keeping the README in one file so that it’s easy to search through. Will add more jumping links later so navigation is easier.
Current TODOs:
-  Shell installer option: prompt user to re-login for 
/etc/profile.dentry to be picked up -  Binary tarball option: prompt user to create 
/etc/profile.dentry and re-login - Fanquake docker option: complete section
 -  Arch Linux AUR option: prompt to start 
guix-daemon-latestunit after finishing “optional setup” section - Building from source option: Insert dependency tree diagram that I made
 - Building from source option: redo sectioning, kind of a mess right now
 - Optional setup: make clear which parts are only needed if building from source
 - Workaround 1 for GnuTLS: perhaps mention how to remove Guix build farm’s key
 - Overall (after everything): Make the links work.
 
Note to self: wherever possible, tell user how to check that something is true rather than branching by installation option.
