New dockerfile for #427.

[halkeye]

Builds all the binaries on demand, then creates a new image with just the binary.
Easy to do tagged releases or multi arch builds, etc.

[halkeye]

having it as command instead of entry point makes it more overriable, but less obvious

docker run crate-ci/typos would run typos
docker run crate-ci/typos bash would run bash
docker run crate-ci/typos typos --with --args would run typos

i can make a smarter entrypoint that handles bash vs not bash though.

https://devopscube.com/run-scripts-docker-arguments/

[halkeye]

Does cargo install build the right one? I'll have to run again when I'm at a computer to confirm its the release version. Otherwise I can probably build release and copy from target instead

[epage]

Does cargo install build the right one? I'll have to run again when I'm at a computer to confirm its the release version. Otherwise I can probably build release and copy from target instead

It looks like cargo install does a release build because it has a --debug flag rather than a --release flag.

[halkeye]

could use https://github.com/docker/build-push-action/blob/master/docs/advanced/multi-platform.md to build and publish to ghcr.io

[epage]

Thanks!