GitLab

Docker images versioning in Jenkins pipeline

See merge request !5

Properly tag generated Docker images.

Use a common [Jenkins shared library](https://gitlab.mim.ovh/EOLE/Zephir/jenkins).

Build and publish image with Jenkins

See merge request !4

Add a Jenkins pipeline to build and publish docker images
on the DockerHub.

The images are built on every branches but only pusblished on staging
and stable branches (i.e. develop and master by default).

Images are published with multiples tags:

- <image_name>:<short_commit_ref>
- <image_name>:<stable|staging>-latest

Upgrading Keycloak version to last stable 4.8.3

See merge request !3

Fix 241

See merge request !2