Add CI (#4)

* Added credo

* Added and ran Prettier; First pass at GH Actions

* Updated actions workflow to hopefully work on this branch

* Name the folder correctly how about

* Added proper container prefix to commands

* Apparently you have to get back into the root after commands

* CI is working, update branches to final value

.gitignore

@@ -33,6 +33,7 @@ pinchflat-*.tar
 
 # In case you use Node.js/npm, you want to ignore these.
 npm-debug.log
+/node_modules/
 /assets/node_modules/
 
 /.elixir_ls