ELI5 how to setup kbin using docker

So does anybody have a walkthrough on how to set this beastie up? I'm not unfamiliar with docker and containers (I have personal Mastodon, Nextcloud, and Synapse Instances running via docker-compose)

Sort of where I'm stuck right now is what I need to change in the .env file, per the instructions here:

$ sudo apt-get install git
$ git clone https://codeberg.org/Kbin/kbin-core.git kbin
$ cd kbin
$ mkdir public/media
$ sudo chown 82:82 public/media
$ sudo chown 82:82 var
$ cp .env.example .env
$ vi .env # esc + !q + enter to exit
or 
$ nano .env

Make sure you have substituted all the passwords and configured the basic services in .env file.

(yes, I know it's somewhat commented, but it's not exactly super clear) and also how to handle building it in a non-local configuration (my VPS is elsewhere, so going to kbin.localhost to do anything isn't really going to work)

So yeah, ELI5.