add localhost link to readme

README.md

@@ -49,6 +49,6 @@ Now, you should be able to connect to your local postgres database!
 
 ### Running the server
 
-To run your local instance of RDB, just do `npm start`. We are working on a way to directly connect to the Heroku Postgres database.
+To run your local instance of RDB, just do `npm start` and go to [localhost:3000](localhost:3000). We are working on a way to directly connect to the Heroku Postgres database.
 
 More info to come - Stay tuned!