heroku npm run build code example
Example: heroku scripts
// When pushing to heroku and it finds a package.json file in the root folder,
// the following npm scripts are gonna be executed:
"scripts": {
"heroku-prebuild": "echo This runs before Heroku installs dependencies.",
"build": "echo This won't run when there's a heroku-postbuild script. Otherwise it runs instead.",
"heroku-postbuild": "echo This runs after Heroku installs dependencies, but before Heroku prunes and caches dependencies.",
"heroku-cleanup": "echo This runs after Heroku prunes and caches dependencies.",
"start": "echo You can specify you start script here."
}