Env Clarification

Clarified that the env variables here are an example output of env. The user should not set them to the example values.

Docker-DCO-1.1-Signed-off-by: Matthias Kühnle <git.nivoc@neverbox.com> (github: float64)
Fixed misspelling

Docker-DCO-1.1-Signed-off-by: Matthias Kühnle <git.nivoc@neverbox.com> (github: float64)