Environment.md: made rpm command sudo

The rpm command for docker fails without sudo privelege.
Environment.md: made rpm command sudo

The rpm command for docker fails without sudo privilege.
Merge branch 'master' of https://github.com/masnes/utilities
Revert "Environment.md: made rpm command sudo"

This reverts commit 4ff839b8b7130b96107b4582696d99f8ef936d2c.
specifying that docker commands require root
Merge pull request #6 from masnes/master

Specify that docker commands require root