Docker caching in CI

.github/workflows/push.yml

@@ -26,19 +26,34 @@ jobs:
       app_image_tag: ${{ steps.tag.outputs.app_image_tag }}
       is_semantic_tag: ${{ steps.tag.outputs.is_semantic_tag }}
     steps:
-      -
-        name: Check out the repo
-        uses: actions/checkout@v2
-      -
-        name: Print Docker version
+      - name: Check out the repo
+        uses: actions/checkout@v4
+
+      - name: Print Docker version
         run: docker -v
       -
         name: Docker login
         if: env.DOCKERHUB_TOKEN
         run: docker login --username "$DOCKERHUB_USER" --password "$DOCKERHUB_TOKEN"
       -
-        name: Build image
-        run: docker build -t $APP_IMAGE .
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: docker-${{ hashFiles('Dockerfile') }}-${{ github.sha }}
+          restore-keys: |
+            docker-${{ hashFiles('Dockerfile') }}
+      -
+        name: Build and push Docker image with cache
+        run: |
+          docker buildx build \
+            --cache-from=type=local,src=/tmp/.buildx-cache \
+            --cache-to=type=local,dest=/tmp/.buildx-cache \
+            --output=type=docker \
+            --tag $APP_IMAGE .
       -
         name: Set image tag
         id: tag
@@ -58,13 +73,13 @@ jobs:
           password: ${{ env.KBC_DEVELOPERPORTAL_PASSWORD }}
           tag: ${{ steps.tag.outputs.app_image_tag }}
           push_latest: ${{ steps.tag.outputs.is_semantic_tag }}
-          source_image: ${{ env.APP_IMAGE}}
+          source_image: ${{ env.APP_IMAGE }}
 
   python-tests:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Build image
         working-directory: ./python-sync-actions
@@ -85,7 +100,7 @@ jobs:
     steps:
       -
         name: Check out the repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       -
         name: Pull image from ECR
         uses: keboola/action-pull-from-ecr@master
@@ -107,7 +122,7 @@ jobs:
     steps:
       -
         name: Check out the repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       -
         name: Pull image from ECR
         uses: keboola/action-pull-from-ecr@master