Add build caching

.github/workflows/release.yaml

@@ -28,6 +28,7 @@ jobs:
         uses: docker/metadata-action@v4
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v2
@@ -41,6 +42,14 @@ jobs:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
+      -
+        name: Cache Docker layers
+        uses: actions/cache@v3
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-multi-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-multi-buildx
       -
         name: Build and push by digest
         id: build
@@ -51,6 +60,11 @@ jobs:
             #tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=local,src=/tmp/.buildx-cache
+          # Note the mode=max here
+          # More: https://github.com/moby/buildkit#--export-cache-options
+          # And: https://github.com/docker/buildx#--cache-tonametypetypekeyvalue
+          cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-new
       -
         name: Export digest
         run: |
@@ -65,6 +79,10 @@ jobs:
           path: /tmp/digests/*
           if-no-files-found: error
           retention-days: 1
+      - name: Move cache
+        run: |
+          rm -rf /tmp/.buildx-cache
+          mv /tmp/.buildx-cache-new /tmp/.buildx-cache
   merge:
     runs-on: ubuntu-latest
     needs: