Forms not working in deno with dev server

[cotyhamilton]

What version of HonoX are you using?

0.1.25

What steps can reproduce the bug?

Requires Deno 2

deno upgrade
deno upgrade rc

Repro: https://github.com/cotyhamilton/deno-honox

deno install
deno task dev

Vist http://localhost:5173/form and submit form

Additionally you can follow the instructions in the README and create form route to reproduce manually

What is the expected behavior?

The form is submitted successfully

What do you see instead?

The server errors with the message Missing content type in console and Internal Server Error 500 response returned to the client

Additional information

This only happens when running the dev server. If you build and serve the output the form submits successfully

deno task build # deno run -A npm:vite build
deno task preview # (cd dist && deno serve -R index.js)