Hi @Ctowle,
I’m not the best at docker build however, if was going to try this my 1st attempt would be to:
- Use the Ubuntu 20.04 image on Docker hub (This has multi arc build - Docker)
2. Install Powershell-Core matching the version of the PSU image you are trying to rebuild.
3. Replicate the build script in this forum post: Docker image not working - #39 by adam
4. use ‘docker buildx’ over ‘docker build’ to build your container.
If that all works as expected, that should give you a Multi arch container you can use on most devices.
Please let me know if you have any questions.