vite2 build image path 404

[manongLY]

Describe the bug

<el-image src="/src/views/system/login/image/img-password.png"></el-image>
使用，npm run build之后无法显示图片。
<img src="/src/views/system/login/image/img-username.png"/>
使用，npm run build之后正常。

Reproduction

System Info

System:
    OS: Windows 10 10.0.19042
    CPU: (24) x64 Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz
    Memory: 8.34 GB / 15.91 GB
  Binaries:
    Node: 14.17.1 - D:\Program Files\nodejs\node.EXE
    Yarn: 1.22.10 - D:\Program Files\nodejs\node_global\yarn.CMD
    npm: 6.14.13 - D:\Program Files\nodejs\npm.CMD
  Browsers:
    Edge: Spartan (44.19041.423.0), Chromium (91.0.864.59)
    Internet Explorer: 11.0.19041.1

Used Package Manager

npm

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.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.

[haoqunjiang]

See #3459 (comment)