fixup! wip: add reusable workflows

Author: whi-tw

.github/workflows/reusable-review_apps_on_pr_change.yml

@@ -38,17 +38,21 @@ jobs:
           HEAD_SHA: ${{ github.event.pull_request.head.sha }}
         run: |
           echo "ECR_REPO=${ECR_REPO}" >> "$GITHUB_OUTPUT"
-          echo "URI=${ECR_REPO}:pr-${PR_NUMBER}-${HEAD_SHA}-$(date +%s)" >> "$GITHUB_OUTPUT"
+          BASE_URI="${ECR_REPO}:pr-${PR_NUMBER}"
+          echo "BASE_URI=${BASE_URI}" >> "$GITHUB_OUTPUT"
+          echo "URI=${BASE_URI}-${HEAD_SHA}-$(date +%s)" >> "$GITHUB_OUTPUT"
+
+      - name: Log in to Amazon ECR
+        uses: aws-actions/amazon-ecr-login@5a88a04c91d5c6f97aae0d9be790e64d9b1d47b7 # v1.7.1
 
       - name: Build container
-        run: docker build --tag "${{steps.generate_image_uri.outputs.URI}}" .
+        run: |
+          docker pull "${{ steps.generate_image_uri.outputs.BASE_URI }}" || true # Pull the previous image to warm the cache, but don't fail if it doesn't exist
+          docker build --tag "${{steps.generate_image_uri.outputs.URI}}" --tag "${{steps.generate_image_uri.outputs.BASE_URI}}" .
 
       - name: Push container
         run: |
-          aws ecr get-login-password --region ${{ inputs.aws-region }} \
-          | docker login --username AWS --password-stdin "${{ steps.generate_image_uri.outputs.ECR_REPO }}"
-
-          docker push "${{steps.generate_image_uri.outputs.URI}}"
+          docker push "${{steps.generate_image_uri.outputs.ECR_REPO }}" --all-tags
 
       - name: Deploy review app via CodeBuild
         id: codebuild