support multi docker arch

Author: gy2006

build.sh

@@ -6,4 +6,4 @@ if [[ -n ${tag} ]]; then
   versionTag="-t flowci/core:$tag"
 fi
 
-docker build -f ./core/Dockerfile -t flowci/core:latest $versionTag ./core
+docker buildx build -f ./core/Dockerfile --platform linux/arm64,linux/amd64 --push -t flowci/core:latest $versionTag ./core