Use {postgres,redis}:alpine images with docker-compose (#372)
Use {postgres,redis}:alpine images with docker-compose (#372)

* Specify Redis major version

Chocobozzz/PeerTube,Green-Star/PeerTube,Green-Star/PeerTube,Chocobozzz/PeerTube,Green-Star/PeerTube,Chocobozzz/PeerTube,Green-Star/PeerTube,Chocobozzz/PeerTube