Do not use this. This was a scratch-pad for how to simplify our build systems. The examples in the Leptos repo now use a tweaked version of this format. You should check out cargo-leptos as a build tool.
Experimenting with a single-folder app
This packs the app, client, and server crates into a single crate/directory. See this issue.
You should be able to launch the client app with a simple trunk serve --open.
To launch the server you can run cargo run --no-default-features --features=ssr.
To compile Wasm for hydrating that server-generated HTML you can wasm-pack build --target=web --no-default-features --features=hydrate