Evaluate building on distroless images

[elasticdog]

I'd like to evaluate if it make sense to use https://github.com/GoogleContainerTools/distroless images as the base for tiddlywiki-docker.

• What would be the space saving?
• Are recent node versions available?
• Would using the Docker's --init flag work for signal handling rather that having tini installed and wrapping our process as part of the image explicitly?