Render is not needed actually. It's one of the requested installation types from our users, so if you want to deploy to Render you can use 1-click install button.
The other installation methods are docker (https://automatisch.io/docs/guide/installation#docker) and docker compose. (https://automatisch.io/docs/guide/installation#docker-compos...) You can choose one of them. I think most of our users are using Docker setup atm.
Please let me know if you have any other questions.