message: added start-hub yarn script
diff: "start-prereqs": "rm -rf $HOME/.cardstack && docker run -d -p 5432:5432 --rm --name cardstack-pg cardstack/pg-test",
  "stop-prereqs": "docker stop cardstack-pg",
  "start": "node ./node_modules/.bin/ember s",
  - "start-hub": "node ./node_modules/.bin/ember hub:start",
  + "start-hub": "node ../hub/bin/cardstack-hub.js",
  "start-ember": "HUB_URL=http://localhost:3000 node ./node_modules/.bin/ember s",
  "test": "ember test"
  },
  