* Complete re-write of Mastodon Production Guide
I re-wrote the Mastodon Production Guide so that it has a better structure.
Work on this re-write was done on my own repo:
https://github.com/staticsafe/mastodon-documentation
* Fix typo in a heading
* Change node.js Repository section to use curl|bash method.
For simplicity's sake
* Add an explanation of the dependencies
Added in the "Various Other Dependencies" section.
* Fix links to the Ruby project, was using the link to Rails previously.