Setting Up Docker CI for Rust with cargo-dist

Rust CI The Core Idea Building Rust inside Docker is slow. A typical multi-stage Dockerfile compiles the binary in one stage and copies it into a minimal image in another. That works fine for local builds, but in CI it takes a long time, especially when you're emulating arm64 through QEMU. The better approach: let cargo-dist handle the compilation as part of the release workflow. By the time the Docker job runs, the binaries are already built and available as GitHub Actions artifacts. Docker jus