Add docker layer caching

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>

.github/workflows/ci.yml

@@ -139,6 +139,14 @@ jobs:
           # TODO: Remove driver-opts once fix is released docker/buildx#386
           driver-opts: image=moby/buildkit:master
 
+      - name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-
+
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v1
         with:
@@ -161,6 +169,8 @@ jobs:
           platforms: linux/amd64,linux/arm/v7,linux/arm64
           push: ${{ github.event_name == 'push' }}
           tags: ${{ steps.tags.outputs.tags }}
+          cache-from: type=local,mode=max,src=/tmp/.buildx-cache
+          cache-to: type=local,mode=max,dest=/tmp/.buildx-cache
           build-args: |
             VERSION=${{ steps.tags.outputs.version }}
             COMMIT_HASH=${{ steps.tags.outputs.commit_hash }}