How to add a new script for build for armv7l

How to build my Electron app using this script in package.json. I use this to run the same to run apps for my raspberry pi.

"build --armv7l --linux"

Adding the above to scripts and running shows errors

Error: Application entry file "index.js" in the "[path]/dist/linux-armv7l-unpacked/resources/app.asar" does not exist. Seems like a wrong configuration.