Andrey Drozd

It's not clearly stated in the general documentation, but I got mine to work by looking at the [README for Heroku](https://github.com/Shopify/shopify-app-template-node/blob/cli_three/web/docs/heroku.md#update-urls-in-partner-dashboard-and-test-your-app) even though I'm not using Heroku. Make sure to...

Also, if you're using the default session storage `SESSION_STORAGE: new Shopify.Session.MemorySessionStorage()`, then you can only run one instance of the app. Otherwise the session might not be accessible.