Change container distro to Debian and Ubuntu to avoid runtime errors. #481
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This commit switches the container's distribution to Debian for building and to Ubuntu for final distribution, because this more closely matches upstream Substrate's build pipeline and seems to more reliably avoid runtime issues caused by missing shared libraries and the like. We also no longer compile statically, for now, as it's not needed in this setup, and we try to maintain a smaller container image size by installing only required packages and components of the Rust toolchain.
In my testing, this creates image sizes of just about ~200MB, which is not terrible but not ideal (previous image sizes were down to ~60MB). Nevertheless, as this also unblocks
entropy-js
, I think it's worth it.