~dricottone/docker-moinmoin19

Update to use `/var/moin` instead of `/var/www`.

In my previous deployments, I've had more success using a custom
directory instead of repurposing the traditional webroot directory.

This is more generally a FYI that I am putting together a final commit
to this repository. I need to start migrating to `moin2`.
fixed markdown blockquote
restructured container for security, readability; re-wrote documentation
fixed markdown (was using moin syntax)
added BSD license
minor vendoring
initial commit with unvendored files