Describe the bug

After changing root path, in vite.config .

source which required in entry html , will not found.

Reproduction

https://stackblitz.com/edit/vitejs-vite-1dynea?file=ss%2Findex.html,vite.config.js&terminal=dev

System Info

System:
    OS: macOS 10.15.7
    CPU: (12) x64 Intel(R) Core(TM) i7-9750H CPU @ 2.60GHz
    Memory: 149.41 MB / 32.00 GB
    Shell: 5.7.1 - /bin/zsh
  Binaries:
    Node: 14.17.0
    Yarn: 1.22.10
    npm: 6.14.13
  Browsers:
    Chrome: 92.0.4515.159
    Safari: 14.1.2
  npmPackages:
    vite: ^2.5.0 => 2.5.0

Used Package Manager

yarn

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to https://github.com/vuejs/vue-next instead.
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• The provided reproduction is a minimal reproducible example of the bug.