To enable login with social providers such as Facebook or Google, prior to running serverless deploy, make sure to create the appropriate Facebook and Google Apps and modify the values in api/config.yml.
Go to https://developers.facebook.com and create a new app.
From the Add Product screen, click "Set up" for Facebook Login
Next, select the "Web" platform.
For the URL of your site, put http://localhost:3000
Navigate to the /apps/{app-id}/settings/basic/ page and set http://localhost:3000 as an App Domain. Click "Save Changes"
Copy the APP ID at the top of the page and add it to api/config.yml as the facebook_app_id. This app id will be deployed the next time you run serverless deploy.
Go to https://console.developers.google.com
Create a project and go to the "Credentials" tab on the left menu.
Click on "Create Credentials" and then "OAuth client ID"
Select "Web application" as the Application type.
Add http://localhost:3000 as an "Authorized JavaScript origin.
Click "Create"
Take the generated Client ID and add it to api/config.yml as the google_app_id.