docker-mailserver/docs/content/advanced/maintenance/update-and-cleanup.md

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# Automatic update
Docker images are handy but it can get a a hassle to keep them updated. Also when a repository is automated you want to get these images when they get out.
There is a nice docker image that solves this issue and can be very helpful. The image is: [v2tec/watchtower](https://hub.docker.com/r/v2tec/watchtower/).
A docker-compose example:
```yaml
services:
watchtower:
restart: always
image: v2tec/watchtower:latest
volumes:
- /var/run/docker.sock:/var/run/docker.sock
```
For more details see the [manual](https://github.com/v2tec/watchtower/blob/master/README.md)
***
# Automatic cleanup
When you are pulling new images in automaticly it is nice to have them cleaned as well. There is also a docker images for this (from Spotify). The image is: [spotify/docker-gc](https://hub.docker.com/r/spotify/docker-gc/).
A docker-compose example:
```yaml
services:
docker-gc:
restart: always
image: spotify/docker-gc:latest
volumes:
- /var/run/docker.sock:/var/run/docker.sock
```
For more details see the [manual](https://github.com/spotify/docker-gc/blob/master/README.md)