* Remove install for shards
shards is not available as a Homebrew package. Instead, it comes with
the crystal package.
<https://crystal-lang.org/reference/1.12/man/shards/index.html#installation>
* Fix postgresql package name
* Add createdb
Fixes initial error:
FATAL: database "<user>" does not exist
<https://stackoverflow.com/a/17936043>
* Clone repo before PostgreSQL setup
The PostgreSQL setup uses config files from the repo.
* Fix PostgreSQL name in headings
* Give PostgreSQL role login permissions
Fixes an error upon running the first script:
FATAL: role "kemal" is not permitted to log in
* Remove nonexistent script
* Use make for Invidious setup
Copied from Linux section