php 中少了 curl

日志：

```
runuser: root, webHost:http://172.25.0.3:3000, machine_ip:172.25.0.5, registryAddress:tcp -h 172.25.0.4 -p 17890:tcp -h 172.25.0.3 -p 17890

./get_tarsnode.sh: line 50: curl: command not found

Tars node download error: http://172.25.0.3:3000/files/tarsnode.tgz

install tarsnode failed, retry 3 seconds later...
```