Publish up-to-date docker images

We are using a couple of docker images for the builds, the tests and the mirrors We should maintain and publish these images in a registry owned by us

This registry could also act as a proxy to get rid of the dockerhub quotas

Goal:

• Be independant of docker hub
• Avoid to have to rebuild locally the images when needed
• It will be needed for a decent CI/CD

comments:

• 1 PM sounds very optimistic
• We could rebuild directly from Dockerfiles instead of proxying images from Dockerhub, to build from source instead of pulling binary blobs
  • rebuild what? where do we stop?
    • just running "docker build" should be easy (IIRC Dockerhub exposes the Dockerfile). you're right that it might wget blobs though, but we can deal with it later

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Migrated from T3934 (view on Phabricator)