wow! Mind blown! 🤯
Thanks to a response from @Codeberg , I found out about the container image generated by "catthehacker" (link below), and it's amazing! This image does *everything* I need, so the workflow code is a lot shorter than before. It can even do multi-arch build!
It was very cumbersome to configure it to understand my environment, but I got it working. And that's good, because my focus is for home labbers. So I'll use that for my blog post.
Thank you!
(PS: It doesn't matter how slow you think a Raspberry Pi is, it's still faster than emulating ARM on an Intel i7. 😄)