Removed Docker production warnings

* Removed warnings.
* Removed inconsistent Community installation sections.
* Fixed all installation page descriptions.
* Removed old .inc files.

Docker-DCO-1.1-Signed-off-by: James Turnbull <james@lovedthanlost.net> (github: jamtur01)
Merge pull request #6053 from jamtur01/produpdate

Removed Docker production warnings
Return devmapper errors with additional text
Docker-DCO-1.1-Signed-off-by: Michael Crosby <michael@crosbymichael.com> (github: crosbymichael)
Merge pull request #6069 from crosbymichael/dm-errors

Return devmapper errors with additional text