feat(ci): add dockerhub publish CI action #35

[garciagenrique]

Solves #35

This PR builds a docker image of the repository and publish it to dockerHub.

Ci works fine - tested on a branch of my fork. See also the CI action output and the published image on dockerhub/garciagenrique.

Few points to discuss/TODO:

• @bari12 we would need to add the rucio docker hub credentials on as secrets of this repo. Could you add them, please?

     - name: Log into the Docker Hub
       id: login
       uses: docker/login-action@v3
       with:
         username: ${{ secrets.DOCKER_USERNAME }}
         password: ${{ secrets.DOCKER_PASSWORD }}

• Image will be only published when a new version of the repository is created. Do we want to push images on every merge to master ? I would say yes. In case we publish the images on merges, which tag should we use for the image ? :latest ? :sha-<SHORT_SHA> ? both ?

[rdimaio]

* [ ]  @bari12 we would need to add the rucio docker hub credentials on as secrets of this repo. Could you add them, please?

To avoid having to duplicate them, they can also be set as organization secrets and made only accessible to the appropriate repos (containers and jupyterlab-extension): https://docs.github.com/en/codespaces/managing-codespaces-for-your-organization/managing-development-environment-secrets-for-your-repository-or-organization#adding-secrets-for-an-organization

[ftorradeflot]

• Image will be only published when a new version of the repository is created. Do we want to push images on every merge to master ? I would say yes. In case we publish the images on merges, which tag should we use for the image ? :latest ? :sha-<SHORT_SHA> ? both ?

Although the master branch should be stable I wouldn't push to latest if it has not been tagged. I propose pushing to :master always and also to :latest and :{tag} when tagged

[garciagenrique]

Although the master branch should be stable I wouldn't push to latest if it has not been tagged. I propose pushing to :master always and also to :latest and :{tag} when tagged

Done @ftorradeflot, thanks for the suggestion !