- Adds a local environment based on docker
- Adds the e2e tests setup
- Adds a "Hello World" e2e test to serve as a template
Props gziolo, herregroen, mcsf.
Fixes#45165.
git-svn-id: https://develop.svn.wordpress.org/trunk@45570 602fd350-edb4-49c9-b593-d223f7449a82