Install deepstream as service get error: "Service already exists, please uninstall first "

[geohuz]

sudo ./deepstream service add -n deepstream -l /var/log -c /etc/deepstream

error message:

Installing service on: /etc/systemd/system/deepstream.service
Service already exists, please uninstall first

[Yasser Fadl]

Interesting, seems we are negating incorrectly on systemD

https://github.com/deepstreamIO/deepstream.io/blob/master/src/service/service.ts#L69

Setup a PR, should be out in next release