use registry caceh to build image

.github/workflows/build-rc.yml

@@ -21,10 +21,13 @@ jobs:
 
     - name: Build Docker Image
       run: |
+        CACHE_REF=weseek/growi:3-cache
         docker buildx build \
           --tag growi \
           --platform linux/amd64 \
           --load \
+          --cache-from=type=registry,ref=$CACHE_REF \
+          --cache-to=type=registry,ref=$CACHE_REF,mode=max \
           --file ./docker/Dockerfile .
 
     - name: Login to docker.io registry