Crystal supports static linking with `--static`, unfortunately glibc and openssl don't like static linking, so it turns out to be easier to do in an alpine linu

Crystal supports static linking with `--static`, unfortunately glibc and openssl don't like static linking, so it turns out to be easier to do in an alpine linux chroot/container/etc which uses musl instead of glibc. Crystal is in the alpine linux repositories as of 3.8, so this should be now a lot easier. If someone wants to generate some good tooling around this workflow, it'd be greatly appreciated.