w3cj dev container features to collection index

[w3cj]

What type of PR is this?

• Add a new dev container collection

Related Issues

None

Description

Adds my feature collection which includes a firewall feature that will configure a firewall to restrict outbound network access. Includes allow lists for common APIs, services and package managers.

Collection checklist

If your PR contributes a new collection, please utilize this checklist:

• Collection name
• Maintainer name
• Maintainer contact link (i.e. link to a GitHub repo, email)
• Repository URL
• OCI Reference
• I acknowledge that this collection provides new functionality, distinct from the existing collections part of this index.