Updated installation docs for CRUX as a Docker Host.

Docker-DCO-1.1-Signed-off-by: James Mills <prologic@shortcircuit.net.au> (github: therealprologic)
Merge pull request #9285 from therealprologic/update-crux-docs

Updated installation docs for CRUX as a Docker Host.
Initial transaction implementation.
Almost there, need to figure out caching.
Caching finally works I think.
Container config fix.