Auto restart and rebuild angular universal on save

I turned my application to angular universal. It's great but I have a problem with developing mode. I need to see my editing result real-time. I need to restart my app on each atrl+s (save) like build --watch and nodmeon.

My server is Eexpressjs and I'm using the command "npm run build:ssr" after each edit. It takes lots of time!!
How can I do that?