Cannot GET / when using viteConfigFile

[jeremy-rifkin]

I'm running into an issue where if I configure vite-express with the following everything works perfectly when I load localhost

ViteExpress.config({
    inlineViteConfig: {
        root: "ui",
        base: "",
    },
});

But if I do the following localhost is a blank page with the text Cannot GET /

ViteExpress.config({
    viteConfigFile: "server/vite.config.js",
});

Where server/vite.config.js contains:

import { defineConfig } from "vite";

export default defineConfig({
    root: "ui",
    base: "",
});

Is this intended behavior? Am I doing something wrong?