diff --git a/docs/images/docker-darktable.md b/docs/images/docker-darktable.md
index 107573aff..66279d563 100755
--- a/docs/images/docker-darktable.md
+++ b/docs/images/docker-darktable.md
@@ -171,6 +171,10 @@ It is possible to install extra packages during container start using [universal
 
 To help you get started creating a container from this image you can either use docker-compose or the docker cli.
 
+!!! info
+
+    Unless a parameter is flaged as 'optional', it is *mandatory* and a value must be provided.
+
 ### docker-compose (recommended, [click here for more info](https://docs.linuxserver.io/general/docker-compose))
 
 ```yaml
@@ -217,8 +221,8 @@ Containers are configured using parameters passed at runtime (such as those abov
 
 | Parameter | Function |
 | :----: | --- |
-| `3000` | Darktable desktop gui. |
-| `3001` | Darktable desktop gui HTTPS. |
+| `3000:3000` | Darktable desktop gui. |
+| `3001:3001` | Darktable desktop gui HTTPS. |
 
 ### Environment Variables (`-e`)