tox
And manual install [1] (with vsellier's api token... only 3 seats in the organization,
so no real place for a bot account?).
It builds and pushes successfully the image.
But, currently the job fails at the end due to internal details of the plugin we are
not able to troubleshoot easily yet (see [3] [4]).
[3] https://jenkins.softwareheritage.org/job/wip-maven-indexer-exporter/92/console
[4] The stage 'push image' raises somehow a null pointer...
```
18:05:42 java.lang.NullPointerException: Cannot invoke method clone() on null object
```