- Add a new Makefile with build, docker-build, test, and clean targets, including cross-compilation support for Linux AMD64 and ARM64.
- Introduce a new Go executable `example-go` with a basic HTTP server setup.
- Create a new Dockerfile for an Alpine-based container including the `example-go` binary, with metadata labels and an entrypoint.
Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
