readme: expand Getting started section

README.md

@@ -1,14 +1,35 @@
 # sapper-template
 
-The default [Sapper](https://github.com/sveltejs/sapper) template, with branches for Rollup and webpack. To clone it and get started:
+The default [Sapper](https://github.com/sveltejs/sapper) template, available for Rollup and webpack.
+
+
+## Getting started
+
+
+### Using `degit`
+
+[`degit`](https://github.com/Rich-Harris/degit) is a scaffolding tool that lets you create a directory from a branch in a repository. Use either the `rollup` or `webpack` branch in `sapper-template`:
 
 ```bash
 # for Rollup
 npx degit "sveltejs/sapper-template#rollup" my-app
 # for webpack
 npx degit "sveltejs/sapper-template#webpack" my-app
+```
+
+
+### Using GitHub templates
+
+Alternatively, you can use GitHub's template feature with the [sapper-template-rollup](https://github.com/sveltejs/sapper-template-rollup) or [sapper-template-webpack](https://github.com/sveltejs/sapper-template-webpack) repositories.
+
+
+### Running the project
+
+However you get the code, you can install dependencies and run the project in development mode with:
+
+```bash
 cd my-app
-npm install # or yarn!
+npm install # or yarn
 npm run dev
 ```