admin without `sudo docker exec -it cocalc bash` -- make the first user created be an admin automatically, and make admin be able to sudo

[williamstein]

Make two changes only when running cocalc-docker:

• first ever user created is an admin
• admin users can sudo (to install more software).

Doing this would make cocalc-docker way more usable, and easier to use with "container image" launching in hosted platforms like Google Cloud Platform that don't (easily?) support sudo docker exec -it cocalc bash.

[omani]

+1

[williamstein]

Increasing the priority of this. It's what many similar products do.