Merge pull request #1021 from alphagov/ldeb-add-deploy-documentation

Add internal documentation on deployments

internal_docs/deploys.md

@@ -0,0 +1,12 @@
+# Deploys
+
+This repo uses [Heroku automatic deploys] to deploy the latest code in the
+`main` branch directly to https://govuk-prototype-kit.herokuapp.com/.
+
+Deployments are configured manually using the dashboard for the
+[govuk-prototype-kit pipeline]. To check the configuration or any deployment
+issues, log into Heroku using the [team credentials].
+
+[Heroku automatic deploys]: https://devcenter.heroku.com/articles/github-integration#automatic-deploys
+[govuk-prototype-kit pipeline]: https://dashboard.heroku.com/pipelines/f0879aaf-21f5-4430-a1d5-7adc4740a066
+[team credentials]: https://github.com/alphagov/design-system-team-credentials/tree/main/heroku