Parcel v2 is serving wrong index.html when there're multiple entry points

[balthild]

🐛 bug report

If I have the followng directory structure

./a/index.html
./b/index.html
./c/ (no files under this dir)

and serving it with parcel v2. Visiting http://localhost:1234/b and http://localhost:1234/c gets ./a/index.html instead of the correct ones.

Related: #3996

🎛 Configuration (.babelrc, package.json, cli command)

yarn parcel ./**/*.html

🤔 Expected Behavior

Get ./b/index.html when visiting /b and a 404 error when visiting /c (since there's no ./index.html, it's not a SPA).

🌍 Your Environment

Software	Version(s)
Parcel	2.0.0-alpha.3.2
Node	v14.4.0
npm/Yarn	1.22.4
Operating System	macOS 10.15.5

[DeMoorJasper]

Have you tried using the nightly release of parcel yarn add parcel@nightly?

[balthild]

I've just tried it. The behavior is the same.

[mischnic]

The dev server should definitely behave more like a traditional web server. (and in the SPA case, use "a index.html in a parent folder" instead of "any index.html")

Somewhat related: #4429