Because there is no update mechanism included in the community edition of portainer, it has to be done manually.
The steps required are
- stop the container of portainer
- Pull the new image
- start docker with the image without forgetting to set the volume
Commands
docker stop portainer
docker rm portainer
docker pull portainer/portainer-ce:latest
docker run -d -p 8000:8000 -p 9443:9443 --name=portainer --restart=always -v /var/run/docker.sock:/var/run/docker.sock -v portainer_data:/data portainer/portainer-ce:latest