metabase-relayd image for Docker

[Alceu Rodrigues de Freitas Junior via cpan-testers-discuss]

Hello folks,

Just released at Github: 
https://github.com/glasswalk3r/docker-metabase-relayd.

Any feedback would be appreciated. When I have some more time (and maybe 
some bug fixes) I'll release it to Docker Hub as well.

Regards,
Alceu