Use a docker registry for cache

[joelwurtz]

Fix #252

WHat it does :

• remove USER_ID features from dockerfile: Without this change the USER_ID make the image dependant on the system that run this command wich creates differents images and make them not shareable
• run frontend / builder / worker as a specific user id : we don't use a named user anymore to avoid headcache when mapping it to a different user id
• local and shared home directory : This allow to debug home directory and files created in it (like composer cache), allow end users to put special scripts in it (like a custom bashrc), and also allow to cache this folder or specific subfolders of this directory within the CI (like the composer / yarn cache)
• command to generate a bake file which allow to push images to the registry
• sudo : it use gosu to fake it since we don't have a named user, it also disable by default as it may be a security risk if image is used in production

[lyrixx]

Is there a simple way to get sudo back? I need it quiet often

[joelwurtz]

Is there a simple way to get sudo back? I need it quiet often

done

[lyrixx]

👍🏼