graphql-engine/docs/graphql/manual/getting-started/using-existing-database.rst

Getting started with an existing database
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Follow one of these guides to set up Hasura GraphQL engine using an existing database:

- :doc:`Using Heroku <../deployment/heroku/using-existing-heroku-database>`: Run on Heroku and connect to an existing
  Heroku Postgres database.
- :doc:`Using Docker <../deployment/docker/index>`: Run as a docker container and connect to an existing Postgres
  database.
- :doc:`Using Kubernetes <../deployment/kubernetes/index>`: Run on Kubernetes and connect to an existing Postgres
  database.