更新 'os/get-repo.sh'

os/get-repo.sh

@@ -33,7 +33,7 @@ case $num in
     echo "缓存创建完成"
     ;;
 2)
-    if [! -d "/etc/docker/" ]; then
+    if [ ! -d "/etc/docker/" ]; then
         mkdir /etc/docker
     fi
     curl -o /etc/docker/daemon.json  https://gitea.beyourself.org.cn/newrain001/download/raw/branch/master/repo/nexus-daemon.json