Non-graceful error when proxy is offline

[manniL]

Environment

• Operating System: Darwin
• Node Version: v21.6.2
• Nuxt Version: -
• CLI Version: 3.11.1
• Nitro Version: -
• Package Manager: pnpm@8.5.0
• Builder: -
• User Config: -
• Runtime Modules: -
• Build Modules: -

Reproduction

1. Use the h3 playground example
2. Create a handler with the following code (StackBlitz won't work as it is about proxy):

eventHandler((event) => {
  let url = "http://some-non-existent.url.domain"
  return proxyRequest(event, url)
})

3. Visit the route

Describe the bug

H3 responds with a 500 because the fetch request fails, either because the address can't be found or if the server is offline.

A more graceful way of handling would be nice 🤔

Additional context

No response

Logs

No response