Consider adding the devcontainer feature to the official list

[jrunestone]

There's an official list of available devcontainer features here: https://containers.dev/features.
To add it create a PR here: https://github.com/devcontainers/devcontainers.github.io/blob/gh-pages/_data/collection-index.yml

I didn't just want to do it without consent :D

[dnegstad]

I'd thought about that before but didn't want to add it too early while it was still new and relatively untested; now that the feature has gone through some real usage and bug fixes, I'll open a PR and get it on the list.

[dnegstad]

Opened a PR to add it to the list: devcontainers/devcontainers.github.io#715