Getting error Unable to find Gruntfile when running -grunt serve

[Sabyasachi01]

Hi I installed the SB Admin Angular App and tried to run it with this command.
-grunt serve.

I got the error message as seen in below image. I dont see a GruntFIle in my project folder , which means it wasnt part of the zip File downloaded. Could you please help me to resolve this error and run this App?

Thanks in advance for your help!