Add Allowed MIME types info to image interface (#583)

Author: AlexGaillard

content/guides/01.data-model/3.interfaces.md

@@ -364,11 +364,12 @@ Upload a single file of any mime-type, choose an existing file from the [file li
 
 Upload a single image file, choose an existing image from the [file library](/guides/files/manage), or import an image from a URL.
 
-| Configuration | Options                                                                        |
-| ------------- | ------------------------------------------------------------------------------ |
-| Types         | `UUID`                                                                         |
-| Root Folder   | Folder for the uploaded files. Does not affect the location of existing files. |
-| Crop to Fit   | Crop the image as needed when displaying the image.                            |
+| Configuration      | Options                                                                                                                  |
+| ------------------ | ------------------------------------------------------------------------------------------------------------------------ |
+| Types              | `UUID`                                                                                                                   |
+| Root Folder        | Folder for the uploaded files. Does not affect the location of existing files.                                           |
+| Crop to Fit        | Crop the image as needed when displaying the image.                                                                      |
+| Allowed MIME Types | File type extensions allowed by this interface. Will not override global FILES_MIME_TYPE_ALLOW_LIST defined in your env. |
 
 ### Files