SPA provider (vite)

[Milo123459]

• vite spa provider
• also use out directory if specified in the build command
• vite spa provider

This PR introduces a Vite SPA provider which will automatically run supported applications with Caddy.

It can be configured via NIXPACKS_SPA_CADDY to turn off Caddy, or if you want to turn Caddy on for an application that doesn't automatically get detected, you can specify a build directory with the NIXPACKS_SPA_OUT_DIR variable.

Detection

Vite is detected by:

• vite dependency
• vite.config.js or vite.config.ts
• build script contains vite build

Output directory:

• if outDir is in vite.config.js/ts
• if --outDir is in the build script

Caddy:

• These dependencies are detected:
  • react
  • vue
  • svelte (but not @sveltejs/kit)
  • preact
  • lit
  • solid-js
  • @builder.io/qwik

• Tests are added/updated if needed
• Docs are updated if needed

[Milo123459]

no idea why the lunatic one is failing

[coffee-cup]

Nice work! This will definitely make it easier for people coming from Vite apps.

Do you know how this will interact with users who have a custom nixpacks.toml and Caddy file for deploying static sites already?

[Milo123459]

I'm not sure, but the Caddyfile wouldn't overwrite the users. And im pretty sure it would just use what's in nixpacks.toml as opposed to what the SPA provider generates.