Sync stage-live to stage-fork (#465)

We want to keep the state of `stage-fork` branch the same as the state
of `stage-fork` branch. To achieve that we've added a CI job that
triggers on each push to `stage-live` and pushes the new `stage-live`
changes to `stage-fork`.

.github/workflows/update-environments.yml

@@ -1,10 +1,12 @@
+# Refer to docs/testing-env.md to learn more about deployments configuration.
 name: Update staging and production environments
 
 on:
   push:
     branches:
       - main
       - stage-live
+  workflow_dispatch:
 
 jobs:
   sync-main-to-stage-live:
@@ -14,28 +16,51 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
       - name: Open/update a PR from `main` to `stage-live`
-        id: pull
-        uses: tretuna/[email protected]
+        id: pr
+        uses: tretuna/sync-branches@ea58ab6 # 1.4.0
         with:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
           FROM_BRANCH: "main"
           TO_BRANCH: "stage-live"
-          PULL_REQUEST_TITLE: "Update stage environments"
+          PULL_REQUEST_TITLE: "🪄 [QA] Update stage environments"
           PULL_REQUEST_BODY: "This is a pull request that upon merging will update stage environments with recent `main` changes."
           REVIEWERS: '["andreachapman"]'
+      - uses: studroid/label-pr-or-issue-action@ff48a93 # v1.0.1
+        with:
+          pr-or-issue-number: ${{ steps.pr.outputs.PULL_REQUEST_NUMBER }}
+          label: "⚙️ deployment"
+  sync-stage-live-to-stage-fork:
+    if: github.ref == 'refs/heads/stage-live'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: '0'
+      - name: Sync `stage-fork` with `stage-live`
+        env:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+        run: |
+          git checkout stage-fork
+          git merge origin/stage-live
+          git push origin stage-fork
   sync-stage-live-to-release:
     if: github.ref == 'refs/heads/stage-live'
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v3
       - name: Open/update a PR from `main` to `stage-live`
-        id: pull
-        uses: tretuna/[email protected]
+        id: pr
+        uses: tretuna/sync-branches@ea58ab6 # 1.4.0
         with:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
           FROM_BRANCH: "stage-live"
           TO_BRANCH: "release"
-          PULL_REQUEST_TITLE: "Update release branch"
+          PULL_REQUEST_TITLE: "🚀 [QA] Update release environment"
           PULL_REQUEST_BODY: "This is a pull request that upon merging will update production environment with recent `stage-live` changes."
           REVIEWERS: '["andreachapman"]'
+      - uses: studroid/label-pr-or-issue-action@ff48a93 # v1.0.1
+        with:
+          pr-or-issue-number: ${{ steps.pr.outputs.PULL_REQUEST_NUMBER }}
+          label: "⚙️ deployment"