docker_manager's implementation of `getURL` doesn't use the core
Discourse method so this might seem a little pointless, but it greatly
helps in our ability to grep the plugins so it's worth doing.
* Ember upgrade to 3.6.1
* ember-ajax printing deprecations; stop using it
* Use tag versions when possible instead of hashes
* Remove inline scripts for CSP
* dump `git describe` errors
* Commit hashes still needed for github diff link
* Update READMEs
* Production build
* Make repo-status component more isolated
* Minor tweaks
* Get JS tests in a working state, and write tests for repo-status component
* Add a note about tests in README
* Apply Prettier
* Production build #2
* We need vendor/message-bus.js