Add custom root links (#534)

Author: Samze

jobs/cloud_controller_ng/spec

@@ -231,6 +231,7 @@ provides:
   - cc.app_instance_stopping_state
   - cc.deprecated_stacks
   - cc.temporary_enable_deprecated_thin_webserver
+  - cc.custom_root_links
 
 consumes:
 - name: database
@@ -318,6 +319,12 @@ properties:
   cc.info.custom:
     description: "Custom attribute keys and values for the /v2/info and /v3/info endpoints"
 
+  cc.custom_root_links:
+    description: "Array of custom links to be added to the root '/' endpoint. These will override the default links if the same name is used."
+    example: |
+      - name: my-service
+        href: https://my-service.example.com
+
   cc.nginx.ip:
     description: "IP address for nginx"
     default: ""

jobs/cloud_controller_ng/templates/cloud_controller_ng.yml.erb

@@ -85,6 +85,13 @@ app_domains: <%=
   app_domains.to_json
 %>
 
+<% if_p("cc.custom_root_links") do |custom_root_links| %>
+custom_root_links: <%=
+custom_root_links = p("cc.custom_root_links").flatten
+custom_root_links.to_json
+%>
+<% end %>
+
 reserved_private_domains: <%= p("cc.reserved_private_domains", nil) %>
 disable_private_domain_cross_space_context_path_route_sharing: <%= p("cc.disable_private_domain_cross_space_context_path_route_sharing", false) %>