chiseled variant for approx 50% image size reduction #1012Description
Just for awareness, MS offers slimmed down images when the bare essentials for the runtime are sufficient: https://github.com/dotnet/dotnet-docker/blob/main/documentation/ubuntu-chiseled.md
There are a few types at that link, I've not checked to see what is compatible with Technitium, but the mcr.microsoft.com/dotnet/runtime:8.0-noble-chiseled is only 87 MiB uncompressed compared to the base presently used that is 217MiB uncompressed:
Line 1 in c88fd3c
The current image published is 270 MiB, so a rough estimate of around 140 MiB might be achievable. Something to consider :)