Rebuilding Container kills DNS resolver #57

This feature builds and runs great the first time I run it, but when I rebuild the container, the DNS stops resolving.

I also notice that on rebuild the backup at /etc/resolv.pre-tailscale.conf is gone - so I wonder if this is something to do with it not having the right settings at startup? No idea how to fix - blatting the containers and volumes fixes this, but it's a pain to have to do it every time.

Base image:

FROM ghcr.io/rails/devcontainer/images/ruby:$RUBY_VERSION

features:

"features": {
"ghcr.io/devcontainers/features/github-cli:1": {},
"ghcr.io/rails/devcontainer/features/activestorage": {},
"ghcr.io/devcontainers/features/docker-outside-of-docker:1": {},
"ghcr.io/rails/devcontainer/features/postgres-client": {},
"ghcr.io/tailscale/codespace/tailscale": {}
},