npm install -g elm-spa@latest

npx elm-spa new

your-new-project/
  - elm.json
  - src/Pages/Home_.elm
  - public/index.html

npx elm-spa server   # Ready at http://localhost:1234

Visit the official site at elm-spa.dev for more examples, guides, and other documentation.

If you are using elm-spa, there's no need to read the ryan-haskell/elm-spa package documentation. The package only exists to constrain the CLI, and provides a few basic internal helper functions.

Check out the official website instead!