How do I serve up the web app for local development?

[adamsimonini]

As a developer,
I want to run the app locally on web,
So that I can do local testing of the web version of the app.

I am used to Expo with react native. I can target Android or Web very easily on my machine. When I run npm run dev, I get a link to the assets being served up on local host for the web. This is my main way of working on the app.

I must be going crazy here. Lynx dev server just serves up a bundle. It works fine on my Android phone... but how the hell do I see the web version of the app? This is so frustrating. There seems to be nothing in the docs about this. Is this a feature, and if not, you need to tell people up front. And if it is a feature, why is it so hard to understand it?