How to load extensions not in the Marketplace (#15573)
How to load extensions not in the Marketplace (#15573)

* How to load extensions not in the Marketplace

* Apply suggestions from code review

Co-authored-by: Guillaume Tardif <fdb6d90518c0d82cc6b9e4626ba807cce7a41bc7@gmail.com>

* List extension that is not from the Marketplace and added note about update

* Apply suggestions from code review

Co-authored-by: Allie Sadler <3ab59c325e83a6f4d1c968ddfef82238a4ecdc43@users.noreply.github.com>

* Move warning to just under the header

Co-authored-by: Guillaume Tardif <fdb6d90518c0d82cc6b9e4626ba807cce7a41bc7@gmail.com>
Co-authored-by: Allie Sadler <3ab59c325e83a6f4d1c968ddfef82238a4ecdc43@users.noreply.github.com>
docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io