Add a Dockerfile and/or publish Docker images

[agriyakhetarpal]

Specifications

1. Can be GLIBC-based
2. Needs to derive from official Python images
3. Should be multi-architecture
4. Should come with a C compiler (GCC/Clang)
5. Should come with Git installed
6. Should come with Go installed (same version as upstream)
7. Should come with Zig installed (optional but useful)

Reasons

1. Will allow testing Linux builds, and cross-compilation by a virtual host Linux system locally
2. Slightly speedier builds on Windows

Plans

1. Later, Docker containers can be tested in CI
2. Publish them to GitHub Packages on releases?
3. MUSL-based (Alpine) images can be used to test Zig's MUSL-based target

[arjxn-py]

I'd be happy if I can pick this up @agriyakhetarpal 🙂

[agriyakhetarpal]

Oh, thanks! Will be much appreciated. I already have scripts/ci/tools/linux/install_go.sh, maybe you can add a similar one to set up Zig too?