message: exit react-scripts watching if the electron process dies
diff: "scripts": {
  "dev": "yarn react-scripts start",
  "build": "react-scripts build",
  - "start": "concurrently \"cross-env BROWSER=none yarn react-scripts start\" \"wait-on http://localhost:3000 && electron .\"",
  - "debug": "concurrently \"cross-env BROWSER=none yarn react-scripts start\" \"wait-on http://localhost:3000 && electron --remote-debugging-port=9223 .\"",
  + "start": "concurrently --kill-others \"cross-env BROWSER=none yarn react-scripts start\" \"wait-on http://localhost:3000 && electron .\"",
  + "debug": "concurrently --kill-others \"cross-env BROWSER=none yarn react-scripts start\" \"wait-on http://localhost:3000 && electron --remote-debugging-port=9223 .\"",
  "package": "electron-builder --dir",
  "dist-all": "npx build --x64 --macos --win --linux --c.extraMetadata.main=build/electron.js -p never",
  "dist-win": "npx build --x64 --win --c.extraMetadata.main=build/electron.js -p never"
  