This change minimizes the work needed to be done when tagging images. It edits the image manifest directly only when necessary, allowing restarts of an app to avoid having an extra layer.
This also additionally allows to deploy images with ONBUILD directives without running the ONBUILD directives.
Lastly, users building docker images that run Dokku will need to use a new sudoer wrapper for the `docker-image-labeler` binary to work correctly. A reference version has been placed in the `docker` skeleton directory.
Closes#3931
Refs #4226
Trace mode is useful for shell code, but less so for golang. Adding debug logging in golang for trigger calls makes it a little easier to see what is happening.
The previous lever for manipulating this was the DOKKU_IMAGE environment variable. While this is all well and good, it only works for CNB and is yet another `DOKKU_*` environment variable that need not exist.
While this does not add support for manipulating the CNB stack just yet, the groundwork is set for the future.
Closes#4306
The default for an app is empty, meaning it will fallback to the global value (which defaults to true). This will allow users to properly override the global value, regardless of what it is.
This functionality enables users to manage a global crontab for the Dokku user that contains all scheduled tasks across all apps. Alternative schedulers can implement cron tasks as desired.
# History
## 0.22.9
Install/update via the bootstrap script:
```shell
wget https://raw.githubusercontent.com/dokku/dokku/v0.22.9/bootstrap.sh
sudo DOKKU_TAG=v0.22.9 bash bootstrap.sh
```
### Bug Fixes
- #4334: @josegonzalez allow git pushes to apps that already exist but have old names
- #4335: @josegonzalez Add error checking to plugin:install and plugin:update
- #4338: @josegonzalez Strip trailing slashes in hostname from web installer
- #4332: @josegonzalez Correct aws release check in release-plugin script
- #4311: @nisseknudsen Allow named volume mounts in regex
- #4320: @josegonzalez Hardcode cnb workdir to /workspace
### New Features
- #4321: @josegonzalez Add git version to output
### Refactors
- #4329: @josegonzalez Standardize apt-get usage
### Documentation
- #4323: @stianlik Fix typo in nginx documentation
### Tests
- #4331: @josegonzalez Switch to upstream bats-core
- #4330: @josegonzalez Switch to using uuidgen for unique app names
### Other
- #4325: @WaviestBalloon Updated bootstrap.sh to not show when $DOKKU_TAG equals nothing
- #4324: @dependabot-preview[bot] chore(deps): bump socket.io from 3.0.5 to 3.1.0 in /tests/apps/.websocket.disabled
- #4319: @josegonzalez Update ruby dependencies in test app
- #4312: @dependabot-preview[bot] chore(deps-dev): bump heroku/heroku-buildpack-php from 187 to 188 in /tests/apps/php
