Personally, I develop on Mac and it runs natively there the same as on Linux.

Windows binaries for the tooling releases I used to build with a cross-compiler, but more recently, GH actions looks attractive enough to take that role.

Edit: Sorry, could have been clearer. The build system is just running the binary directly via nim cpp -r in development, and for production it's nimble. The dockerfile is handcrafted, but of trivial complexity.