add local dev note via ngrok to auth0 docs guide (hasura#3372)

tirumaraiselvan · rikinsk · commit aedcb319cfdf · 2019-11-20T11:42:44.000+05:30
diff --git a/docs/graphql/manual/guides/integrations/auth0-jwt.rst b/docs/graphql/manual/guides/integrations/auth0-jwt.rst
@@ -201,3 +201,8 @@ That’s it! This rule will be triggered on every successful signup/login and sy
 .. note::
 
    We need to use an ``upsert`` operation here because social logins do not distinguish between sign-up and login. Hence, we need to run this rule every time a successful login is made and do nothing if the user already exists.
+
+
+.. admonition:: Local dev with Auth0 rules
+
+   The sync step will require a reachable endpoint to Hasura and this is not possible in localhost. You can use `ngrok <https://ngrok.com/>`_ or similar services to expose your locally running Hasura with a public endpoint temporarily.
