Shopify Node Server command don't working

I need to develop app with node/react and embed it into shopify. I installed shopify cli properly, from installed cli i created new app. When i type shopify node server command on terminal, i get this error message. "tar is required for installing ngrok. Please install tar using the appropriate package manager for your system." is there any program which is named as tar? or what tar refers to for this case? how i can overcome of this problem. i am in trouble. my operating system is windows 7