Update INSTALL.md

INSTALL.md

@@ -116,6 +116,7 @@ To remove also the database (and lose all your data), run:
 The `setup` command generates a Docker Compose YAML file (default filename:
 `docker-compose.yml`) with the container configuration for all services. This
 step can be configured with a (second) YAML formated setup configuration file.
+All options in the [defaults file](https://github.com/OpenSlides/openslides-manage-service/blob/main/pkg/config/default-config.yml) can be used to configure the setup.
 
 E. g. create a file `my-config.yml` with the following content:
 
@@ -154,7 +155,7 @@ So for most updates pulling the new ones and re-running `up` as described [above
 However, this can be unreliable if `docker` fails to recognize a new image in the registry.
 On the other hand, it can mean services will update "by themselves" due to silently using a new image.
 
-It is therefore recommended to pin the version explicitly in the `config.yml` like this:
+It is therefore recommended to pin the version explicitly in the `my-config.yml` like this:
 
     ---
     defaults: