2460: Switch to a base image containing base tools and the podop and socrate libs r=mergify[bot] a=ghostwheel42
## What type of PR?
enhancement of build process
## What does this PR do?
Changes build.hcl to build core images using a base image.
Also adds a "assets" base image for the admin container.
Co-authored-by: Alexander Graf <ghostwheel42@users.noreply.github.com>
Co-authored-by: Pierre Jaury <pierre@jaury.eu>
Co-authored-by: kaiyou <pierre@jaury.eu>
Co-authored-by: Dimitri Huisman <52963853+Diman0@users.noreply.github.com>
This ensures that we share the auth-cache... will enable memory savings
and may improve performances when a higher number of cores is available
"smarter default"
