Rearrange the existing info a little, and add example style guide

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
Merge pull request #5587 from SvenDowideit/docs-examples-style-guide

Rearrange the existing info a little, and add example style guide