Update README.md

Author: Anita Caron

README.md

@@ -3,23 +3,28 @@
 Custom configuration at `dashboard-config.yml`
 
 ```yaml
-id: Ontology id
-mirror_from: Link to the OWL file in your repository.
-title: Ontology's title
-contact: 
-  email: 
-  label: 
-  orcid: 
-  github: 
-description: Ontology's description
-domain: Ontology's domain
-homepage: Ontology's page
-products:
-  - id: 
-dependencies:
-  - id: 
-tracker: Ontology's issue tracker
-license:
-  url: License's url
-  label: License's label
+...
+ontologies:
+  custom:
+    - id: Ontology id
+      mirror_from: Link to the OWL file in your repository.
+      title: Ontology's title
+      contact: 
+        email: 
+        label: 
+        orcid: 
+        github: 
+      description: Ontology's description
+      domain: Ontology's domain
+      homepage: Ontology's page
+      products:
+        - id: 
+      dependencies:
+        - id: 
+      tracker: Link to ontology's issue tracker
+      license:
+        url: License's url
+        label: License's label
+      preferredPrefix:
+      base_ns: Base namespaces
 ```