Document tini

[benatkin]

Unlike the official images for python and node, Deno's docker images bundle tini. This seems to be a good idea, but it doesn't say in the README why it uses tini and others don't. I think it's because other runtimes let the devs deal with the mess that having no init and having no signal handling creates, while Deno helps by adding tini.

Perhaps Deno could make it so tini (or docker run --init) is presented less as the only way to run it, because the signal API was made stable (February 17, 2022) after tini was added to the Dockerfile(Aug 23, 2021).

[dojyorin]

I also agree with using Docker built-in tini.
I think contents of container image should be simple.

[benatkin]

Also the Docker image from which it pulls tini, buildpack-deps, doesn't mention tini in its README

[dojyorin]

Although experimental I created simple and clean dockerfile for alpine and distroless.
Synced daily with original deno and automatically pushed to DockerHub.
If works fine, I consider making pull request to this repository.