Describe the bug

server in the user config option called middlewareMode and server in the hmr options are typed as http.Server. But because the httpServer belonging to the ViteDevServer is typed as something less restrictive, ViteDevServer's own httpServer cannot be used as server in the middlewareMode or hmr options for another vite config. This seems unnecessary, especially since doing so anyway (despite TypeScript's protests) still results in a working config.

I intend to submit a PR for this issue.

Reproduction

https://github.com/emilefokkema/vite-server-type-reproduction

Steps to reproduce

Run npm install followed by npm run typecheck

System Info

System:
    OS: macOS 13.5.1
    CPU: (10) arm64 Apple M1 Pro
    Memory: 1.43 GB / 32.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.15.0 - ~/.nvm/versions/node/v20.15.0/bin/node
    npm: 10.7.0 - ~/.nvm/versions/node/v20.15.0/bin/npm
    pnpm: 9.4.0 - /usr/local/bin/pnpm
  Browsers:
    Chrome: 126.0.6478.127
    Safari: 16.6
  npmPackages:
    vite: ^5.3.3 => 5.3.3

Used Package Manager

npm

Logs

No response

Validations

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• The provided reproduction is a minimal reproducible example of the bug.