Changes summary:
* Added available USE flags table(description included).
* Added some tips regarding the use of docker in the Gentoo environment.
* Sorted out docker installation ways.
* Added information about the newly created Gentoo Docker team.
* Misc improvements
Signed-off-by: Pavlos Ratis <dastergon@gentoo.org>
Upstream-commit: f90d201d887028e21290a413046eb1af7fc8e609
Component: engine