add page_description and page_keywords md meta to mkdocs html template

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
remove rst/sphinx documentation

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)
Merge pull request #5516 from SvenDowideit/docs-meta-rendering

add page_description and page_keywords md meta to mkdocs html template
Merge pull request #5519 from SvenDowideit/remove-rst-docs

remove rst/sphinx documentation
Timestamps for docker logs.

Fixes #1165
Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)