reference script file outside of webpack build

I am server rendering my react app like this:

export default ({ clientStats }: { clientStats: any }) => async (req: Request, res: Response, next: any) => {
const context: any = {};

const app = (



);

if (context.url) {
res.writeHead(301, {
Location: context.url
});

res.end();
return;
}

const { styles, js, scripts } = flushChunks(clientStats, {
chunkNames: flushChunkNames()
});

const appString = renderToString(app);
const { title } = Helmet.renderStatic();

res.status(200).send(`







${styles}
${title}

`);
};

How can I reference a script that is outside of the webpack build?

I have an `init.js` file that does very little and I want to just reference it. I don't need it transpiled or anything.

Where can I put it so that when the html is rendered, the script tag resolves?