Doc updates

Author: jherr

README.md

@@ -18,3 +18,5 @@ pnpm i
 | `npx . app-ts-tw --template typescript --tailwind` | Creates a TypeScript app with Tailwind CSS |
 
 You can also add `--tailwind` to the command to automatically add Tailwind CSS to the app.
+
+There is also `--package-manager pnpm` that will use [pnpm](https://pnpm.io/) as the package manager (this supports `yarn`, `bun`, and `npm` as well).