Add cache to build step in backend

.github/workflows/docker-image.yml

@@ -49,11 +49,13 @@ jobs:
       - name: 🏗️ Build backend and push
         uses: docker/build-push-action@v3
         with:
-          push: false
+          push: push
           context: backend
           tags: infisical/backend:${{ steps.commit.outputs.short }}, 
                 infisical/backend:latest
           platforms: linux/amd64,linux/arm64
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache-new,mode=max
       - # Temp fix
         # https://github.com/docker/build-push-action/issues/252
         # https://github.com/moby/buildkit/issues/1896
@@ -110,7 +112,7 @@ jobs:
       - name: 🏗️ Build frontend and push
         uses: docker/build-push-action@v3
         with:
-          push: false
+          push: true
           context: frontend
           tags: infisical/frontend:${{ steps.commit.outputs.short }}, 
                 infisical/frontend:latest