docs(mobile): add release procedure docs

apps/mobile/docs/release-procedure.md

@@ -0,0 +1,15 @@
+# Releasing to Production
+
+The code is being actively developed on the `main` branch. Pull requests are made against this branch.
+
+When we want to make a release, we create a new branch from `main` called `mobile-release/vX.Y.Z` where `X.Y.Z` is the
+version number of the release.
+
+This will trigger a new build on the CI/CD pipeline, which will build the app and submit it to the internal distribution
+lanes in App Store and Google Play Store.
+
+The release has to be tested by QA and once approved can be promoted to the production lane.
+
+## Triggering Maestro E2E tests
+
+On the release PR add the github label `eas-build-ios:build-and-maestro-test` to trigger the e2e tests in Expo CI.