add documentationPage to connector definition (#3)

Author: hgiasac

connector-definition/connector-metadata.yaml

@@ -1,5 +1,6 @@
 packagingDefinition:
   type: ManagedDockerBuild
+documentationPage: https://hasura.io/docs/3.0/business-logic/overview
 nativeToolchainDefinition:
   commands:
     start:
@@ -20,4 +21,4 @@ dockerComposeWatch:
   # For any other file change, simply copy it into the existing container and restart it
   - path: ./
     target: /functions
-    action: sync+restart
+    action: sync+restart