docker auto build and push - new workflow

[maany]

close #146

Workflow is triggered when a "New Release" is created.

Currently, it auto builds and publishes to docker hub the images for clients, server and daemons.

Sample run for 1.26.2 release: Trigger Event: https://github.com/maany/containers/releases/tag/1.26.2 Workflow run: https://github.com/maany/containers/actions/runs/1190538947 Published image (server, 1.26.2): https://hub.docker.com/r/maany/rucio-server/tags?page=1&ordering=last_updated Published image (clients, 1.26.2): https://hub.docker.com/r/maany/rucio-clients/tags?page=1&ordering=last_updated Published image (daemons, 1.26.2): https://hub.docker.com/r/maany/rucio-daemons/tags?page=1&ordering=last_updated

[maany]

@bari12 should be good to go.