@@ -96,6 +96,8 @@ make link
 
 ## Configure `abra` with `abra.yml`
 
+You can place an `abra.yml`-file in the root of your .abra-project.

@@ -116,1 +118,4 @@
 
+### `$EDITOR`
+
+When you edit .env.sample-files, you are asked to chose an editor. To avoid answering that question all the time, you can either set an environment variable (`export EDITOR=nano`), or you can set it as a config-option in abra.yml, like this:

@@ -690,0 +704,4 @@
+
+You can view all information about containers and images using the command `docker system df -v`. You might see images used by 0 containers and DEAD and exited containers. 
+
+If you are *completely* SURE that you have deployed all the apps, you want to keep, you can remove all dead and unused images and containers with the command `docker system prune --all --force` (or `DOCKER_CONTEXT=foo docker system prune --all --force` if you have multiple docker contexts).