chore: Add smoke test to CI deployment

.github/workflows/update-lost-pixel-baseline.yml

@@ -0,0 +1,47 @@
+name: Update Lost Pixel Baseline
+
+# Run this workflow to update the Lost Pixel baseline on a PR.
+
+on: workflow_dispatch
+
+jobs:
+  lost-pixel-update:
+    runs-on: ubuntu-latest
+    # Only run this job on branches other than master; this is to prevent the Lost Pixel baseline from being updated on the master branch.
+    # The baseline should only be updated on PRs, not on the master branch.
+    if: ${{ github.ref != 'refs/heads/master' }}
+    steps:
+    - name: Checkout validator site
+      uses: actions/checkout@v2
+    - name: Use Node.js 14.x
+      uses: actions/setup-node@v1
+      with:
+        node-version: 14
+    - name: Install
+      run: npm install
+    - name: Test
+      run: npm test
+    - name: Start server (in background)
+      run: npm run start &
+
+    - name: Lost Pixel
+      id: lp
+      uses: lost-pixel/lost-pixel@v3.8.0
+      env:
+        LOST_PIXEL_MODE: update
+    - name: Create Pull Request
+      uses: peter-evans/create-pull-request@v4
+      if: ${{ failure() && steps.lp.conclusion == 'failure' }}
+      with:
+        token: ${{ secrets.PUBLIC_REPO_ACCESS_TOKEN }}
+        commit-message: Update lost-pixel baselines
+        committer: openactive-bot <openactive-bot@users.noreply.github.com>
+        author: openactive-bot <openactive-bot@users.noreply.github.com>
+        signoff: false
+        branch: 'lost-pixel-update/${{ github.ref_name }}'
+        delete-branch: true
+        title: 'Lost Pixel update - ${{ github.ref_name }}'
+        body: Automated baseline update PR created by Lost Pixel
+        labels: |
+          automated pr
+        draft: false