I wish there were fixes to devcontainers before doing adding copilot. I really want declarative, repeatable builds that are easily used in both Codespaces AND Actions. I know all of the functionality is theoretically there in devcontainers.json, it is so manual to configure and confusing, that anytime I've done it, I use it for 2 weeks and then just go back to developing on local because I don't have time to keep that up. ESPECIALLY if you're deploying to AWS cloud and also, want to use alternative package managers like poetry, uv, yarn, jsr, etc.