REDIS Replacement

I've spent several days building a complete new redis image.
I would to request an evaluation from the community, to see if we can use this as the basic redis image instead of sameersbn/docker-redis.

Source repository:

• https://github.com/GJRTimmer/docker-alpine-redis
• https://gitlab.timmertech.nl/docker/alpine-redis

Both source repositories are the same.

Overview:

• alpine:3.4
• S6-Overlay
• redis:3.2.5
• master / slave support
• full sentinel support (optional, can be activated from docker-compose)
• full docker support for master / slave / sentinel
• USERMAP_UID/GID support which was requested with an issue on your repo.
• ability to run either redis-server or redis-sentinel or both within the same image.

For more information about sentinel: https://redis.io/topics/sentinel

I've thoroughly tested the master with multiple slaves with sentinel, automatic failover etc..., everything is working.

Also everything is documented within the README and I've provided 7 docker-compose examples, see the readme for more information.

I really hope everyone likes this new image, and are willing to evaluate it and look at the possibility to either reference it within docker-gitlab or fork my github repo.

Start with the proposed docker-alpine-redis repositories, their README, and the seven docker-compose examples, then compare them with the current sameersbn/docker-redis image used by this project. Done means completing the community evaluation and deciding whether docker-gitlab should reference or fork the proposed image.