My standard emacs config file (as backup, and to have it available everywhere).
The single source of truth is the config.org file, from which the init.el file can be generated.
For documentation on how to do that, as well as on the file contents, have a look at the config.org file.
The init.el file is checked in simply so that a working config is available directly, without having to tangle a usable config from the org document first.