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Created December 29, 2019 09:59
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How to use a Zeit Now subdomain with a Heroku deployment.
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zeit-now-subdomain-with-heroku.md

How to use a Zeit Now subdomain with a Heroku deployment

In the following steps replace:

  • subdomain with your desired subdomain.
  • domain.com with your domain.
  • random.herokudns.com with your Heroku DNS target (see step 1).

  1. In the Heroku deployment settings, under domains, click “Add domain”. Enter subdomain.domain.com to receive the random.herokudns.com Heroku DNS target.

  2. In the Heroku deployment settings, under SSL certificates, ensure a certificate is automatically managed. If you don’t do this, attempting to visit https://subdomain.domain.com in a browser will fail with an SSL error.

  3. If you already aliased the subdomain to a Zeit Now deployment, use the Zeit Now CLI to remove the alias (I’m not sure what happens if you don’t do this):

    now alias rm subdomain.domain.com

  4. Add the CNAME DNS record so that the subdomain will be served by Heroku:

    now dns add domain.com subdomain CNAME random.herokudns.com

Within 60 seconds your Heroku deployment should serve https://subdomain.domain.com.

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