build: configure asset dir to static to match prior behavior (#3118)

## Description

Found in bug bash, there were strange mime type errors, but at least
some of these seem to stem from things trying to authenticate when they
did not need it. `vite` has a different default asset directory than
`CRA`. This PR changes the default to instead use `static` as CRA did

Author: mcmcgrath13

apps/modernization-ui/vite.config.mts

@@ -34,6 +34,6 @@ export default defineConfig(({ mode }) => {
                 '/login': { target: `http://localhost:${NBS_API_PORT}`, changeOrigin: true },
             },
         },
-        build: { outDir: 'build' },
+        build: { outDir: 'build', assetsDir: 'static' },
     };
 });