Add failure message

.github/workflows/docs-amplify.yaml

@@ -23,8 +23,19 @@ jobs:
 
     - name: Create Amplify preview environment
       uses: gravitational/shared-workflows/tools/amplify-preview@tools/amplify-preview/v0.0.1
+      continue-on-error: true
       with:
         app_ids: ${{ vars.AMPLIFY_APP_IDS }}
         create_branches: "true"
         github_token: ${{ secrets.GITHUB_TOKEN }}
         wait: "true"
+
+    - name: Print failure message
+      if: failure()
+      env:
+        ERR_TITLE: Teleport Docs preview build failed
+        ERR_MESSAGE: >-
+          Please refer to the following documentation for help: https://www.notion.so/goteleport/How-to-Amplify-deployments-162fdd3830be8096ba72efa1a49ee7bc?pvs=4
+      run: |
+        echo ::error title=$ERR_TITLE::$ERR_MESSAGE
+        exit 1