Some other posts/resources I’ve seen (still no clear solutions though):
- Why would someone use dockertools.buildimage over using a Dockerfile? - #5 by NobbZ
- Minimal elixir dockerTools image · GitHub
- dockerTools.buildImage layers are 2x too big · Issue #94636 · NixOS/nixpkgs · GitHub (explains same problem, never answered)
- The Quest for Minimal Docker Images, part 1 (3 parts)