How to: Lab 2.5. Container privileges
1. Display your system's current user
2. Display the current user's UID, GID and group memberships
3. Run a `ubuntu` container interactively, and in the container shell:
   - display the current user
   - display the current user's UID, GID and group memberships
   - list existing user accounts
   - list existing groups
   - create a file called `test-file` and display the file ownership info
   - exit the container
4. Run a new `ubuntu` container interactively with UID 1004, and in the container shell:
   - display the current user
   - display the current user's UID, GID and group memberships
   - exit the container
5. Create a docker image based on `ubuntu` with a non-root user as default user
6. Run a container interactively using the image, and in the container shell:
   - display the current user
   - display the current user's UID, GID and group memberships
   - exit the container
7. Delete created resources
lab2.5 solution
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