Docker: docker: Error response from daemon: linux spec user: unable to find user myuser: no matching entries in passwd file

According to the documentation you can use the ID of the user / group:

When passing a numeric ID, the user does not have to exist in the container.

Source: https://docs.docker.com/engine/reference/run/#user

The command could look like this:

docker run -p 6379:6379 --user 1001 redisc