Auto update your docker containers from fresh images.
This script takes for granted that you use files like:
docker run -d \
--name=portainer\
-v /var/run/docker.sock:/var/run/docker.sock \
-e PGID=1001 -e PUID=1000 \
-p 9000:9000 \
portainer/portainer:latest and pull the latest images. Also, make sure that you are not losing any data updating.
Point the script to the directory of your docker files, and if you would like some of your containers to not be updated, add them to an ignore list (simple text file ending with \n)
Running this script WILLL stop and remove containers that need to be updated AND remove old images in the end.