Simple

run: npm start --port 4000 --host 0.0.0.0

Express Server

script:
  npm ci --production
  npm run build
run: node server.js --port=4000

NestJS

script:
  npm install
  npm run build
  npx prisma migrate deploy
run: npm run start:prod -p 3000

NextJS

script:
  npm install
  npm run export
run: serve out -p 8080

WEBPACK / VITE

Simply specify your output folder for your static are exported to. Deploy will look for index.html

run: dist