docs(developer/setup/docker): add information about container engine lifecycle

docs/developer/setup/docker.md

@@ -329,6 +329,40 @@ instances:
 rm -rf .state/
 ```
 
+### Container engine
+
+Your container engine, often Docker or Podman, over time will accumulate state.
+This state comes in form of images, networks and containers. Due to the nature
+of immutable infrastructure, assets are often replaced with newer generations.
+
+For images this means that old ones pile up, while new ones are being used with
+current containers.
+
+Delete dangling images regularly.
+
+```sh
+docker image prune
+```
+
+Delete all unused images, which are not used by any container, regularly.
+
+```sh
+docker image prune -a
+```
+
+Delete all unused networks regularly.
+
+```sh
+docker network prune
+```
+
+In case you run into trouble, as a last resort you can always reset the state of
+your container engine completely.
+
+```sh
+docker system prune -a
+```
+
 ## Running multiple instances
 
 Set up as many different projects as you need. Make sure the