Change dev and build commands to use npm scripts to allow remix cli (#…

…8975)

Co-authored-by: Matt Brophy <matt@brophy.org>

docs/future/spa-mode.md

@@ -58,15 +58,15 @@ export default defineConfig({
 In SPA Mode, you develop the same way you would for a traditional Remix SSR app, and you actually use a running Remix dev server in order to enable HMR/HDR:
 
 ```sh
-remix vite:dev
+npx remix vite:dev
 ```
 
 ### Production
 
 When you build your app in SPA Mode, Remix will call the server handler for the `/` route and save the rendered HTML in an `index.html` file alongside your client side assets (by default `build/client/index.html`).
 
 ```sh
-remix vite:build
+npx remix vite:build
 ```
 
 #### Preview