prerender does not work with recommended vercel template

[lifeiscontent]

I'm using React Router as a...

framework

Reproduction

Minimal reproduction: https://codesandbox.io/p/devbox/64pkht?file=%2Fvite.config.ts%3A28%2C1

1. kill server
2. run pnpm build see it fail

see it work:

1. comment out these lines:

    build: {
      assetsInlineLimit: 0,
      sourcemap: "hidden",
      rollupOptions: isSsrBuild
        ? {
            input: "./server/app.ts",
          }
        : undefined,
    },

2. run pnpm build

System Info

System:
    OS: Linux 6.1 Debian GNU/Linux 12 (bookworm) 12 (bookworm)
    CPU: (2) x64 AMD EPYC
    Memory: 1.70 GB / 4.01 GB
    Container: Yes
    Shell: Unknown
  Binaries:
    Node: 20.12.0 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.5.0 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/share/npm-global/bin/pnpm
  npmPackages:
    @react-router/dev: ^7.1.1 => 7.1.1 
    @react-router/express: 7.1.1 => 7.1.1 
    @react-router/node: ^7.1.1 => 7.1.1 
    @react-router/serve: ^7.1.1 => 7.1.1 
    react-router: ^7.1.1 => 7.1.1 
    vite: ^5.4.11 => 5.4.11

Used Package Manager

npm

Expected Behavior

able to build with prerender

Actual Behavior

due to customization of the build in Vite, build fails.

[brophdawg11]

I think this was fixed in 7.3.0 by #13082, but as an FYI please see this comment for a note on prerendering + custom servers.