Joshua Spiewak

Run the docker image in parallel testing each package installer

Enable building on bionic

1

Tweak comments, brackets, etc.

Find new place to get ffmepg 4

2

The PPA has been [taken down](https://launchpad.net/~jonathonf): > I will be removing most of my PPAs from public access due to continued and persistent abuse by companies using these packages for...

So that package installs from one don't affect another See #122

Only trigger deploy to Netlify from main branch

4

The Netlify step appears to run on every change, regardless of branch, resulting in no-op deployments in Netlify. Should it have `if: github.ref == 'refs/heads/main'` as a guard clause like...