diff --git a/Custom-Startup-Scripts.md b/Custom-Startup-Scripts.md
new file mode 100644
index 0000000..f246fe1
--- /dev/null
+++ b/Custom-Startup-Scripts.md
@@ -0,0 +1,29 @@
+When using `docker-compose`, all the python scripts present in `/opt/netbox/startup_scripts` will automatically be executed in the context of `./manage.py` after the application boots.
+
+That mechanism can be used for many things, e.g. to create Netbox custom fields:
+
+```python
+# docker/startup_scripts/load_custom_fields.py
+from django.contrib.contenttypes.models import ContentType
+from extras.models import CF_TYPE_TEXT, CustomField
+
+from dcim.models import Device
+from dcim.models import DeviceType
+
+device      = ContentType.objects.get_for_model(Device)
+device_type = ContentType.objects.get_for_model(DeviceType)
+
+my_custom_field, created = CustomField.objects.get_or_create(
+    type=CF_TYPE_TEXT,
+    name='my_custom_field',
+    description='My own custom field'
+)
+
+if created:
+  my_custom_field.obj_type.add(device)
+  my_custom_field.obj_type.add(device_type)
+```
+
+## Disable Startup Scripts
+
+The execution of the startup scripts can be prevented by setting the environment variable `SKIP_STARTUP_SCRIPTS` to `true`, e.g. in the file `env/netbox.env`.