Use node 16.0.0
npm v16.0.0
Run Tailwind build process
npx tailwindcss -i ./src/assets/app.scss -o ./src/assets/output.css --watch
To make the manifest copying work, the current solution is to change the output directory to manifest/manifest.json And then manually copy it over. It doesn't create a new file when builds are made.
npm install
npm run serve
npm run build