- push images to https://hub.docker.com/r/shaarli/shaarli/tags using a personal access token (access tokens are not available for organizations)
- push an image tagged :latest for builds on master
- push an image with the same tag as the git tag for v*.*.* tags, and for the "release" branch
- update documentation (remove references to Travis/Drone CI
- deprecate stable and master Docker tags (ref. https://github.com/shaarli/Shaarli/issues/1453)
- add deprecation notices to CHANGELOG.md
This is kind of a quick & dirty setup in order to fix our non-CI current status.
We can later decide to either improve it or fix Drone CI.
Related to #1754
