While the latest packages may continue to work on other releases, we will no longer officially support these releases, nor will we distribute packages.
A DOKKU_SCALE file will always be used for managing the scale count for an app if it exists in a repository. As such, ps:scale usage should be disabled in those cases. This commit makes that more apparent.
Also document how to build a specific core plugin for testing purposes.
Closes#3544
- Simplify test location documentation
- Add documentation surrounding our existing CI environment
- Dedent items that shouldn't be in a list
[ci skip]