feat: 自动更新从 list.yaml 下载最新文件

docker/install/install.sh

@@ -101,6 +101,11 @@ fi
 DEFAULT_REPO_FILE="docker-ce.repo"
 if [ -z "$REPO_FILE" ]; then
 	REPO_FILE="$DEFAULT_REPO_FILE"
+	# Automatically default to a staging repo fora
+	# a staging download url (download-stage.docker.com)
+	case "$DOWNLOAD_URL" in
+		*-stage*) REPO_FILE="docker-ce-staging.repo";;
+	esac
 fi
 
 mirror=''