Allow a new environment variable to change the UID of the docker

[JGodin-C2C]

What does this Pull request solve ?

In some configurations, the UID is forced to be in a certain random range for security purpose. This could lead to some troubles for redis to run and if it needs to write on the disk with only write access to the user the container orchestrator choose for it.

How to solve this problem ?

As you can see, if the variable FORCE_DAEMON_UID is passed to the container, it will relabel the redis user with this UID and change all the files that belongs to the old redis UID to the new redis UID

Regards

[tianon]

See #48 for where we added support for running the image with an arbitrary --user value (which has an equivalent in docker-compose.yml, kubernetes pod specs, etc).

[JGodin-C2C]

Yes, you are right, sorry for the overhead :(

[denilsonsa]

If anyone came to this issue and doesn't know how to set a --user through the docker-compose.yaml, just add: user: 1001:1001 (format is UID:GID, 1001 is an example)