Proxy configuration with proxyRequest or routeRules

[JBustin]

Hello,
I'm currently trying to find the better way to implement my proxy rules with nitro (in a nuxt3 project).
My proxy rules must be optionally enabled in dev and prod build mode.

So I cannot use devProxy entry in configuration. Too bad because I was able to apply all the settings I need: timeout, secure, changeOrigin, headers, connection, ...

    devProxy: {
      '/content': {
        timeout: 10000,
        target: 'https://other.dns.com/content',
        secure: false,
        changeOrigin: true,
        headers: {
          Authorization: `Basic mybasicauth`,
        },
        connection: 'keep-alive',
      },
    },
  },

So I'm trying to use a more programmatic approach with handlers configuration entry and defineEventHandler + proxyRequest like this:

  handlers: [{
    route: '/content',
    handler: defineEventHandler(event =>
      proxyRequest(event, `https://other.dns.com/content${event.node.req.url}`, {
        headers: {
          Authorization: `Basic mybasicauth`,
        },
      },
  }),

But I don't find any way to configure the timeout and other settings.
I don't see in the documentation what are the available options for routerRules too, if it is possible to do what is done with devProxy.
Any idea ?

Regards