Currently I'm trying to inject my environment variables in a service worker file inside of the public directory, I've done a lot of things but all of them ended up with having undefined as the value (Docker is a pain)

So I've tried using instrumentation, it works but is this a good use case? Anything better or is this good enough?

export async function register() {
  if (process.env.NEXT_RUNTIME === 'nodejs') {
    const path = await import('node:path');
    const fs = await import('node:fs/promises');

    const CONFIG = {
      someKey: process.env.NEXT_PUBLIC_SOME_KEY,
      someOtherKey: process.env.NEXT_PUBLIC_SOME_OTHER_KEY
    };

    await fs.writeFile(
      path.join(__dirname, '..', '..', 'public', 'sw.js'),
      `
const CONFIG = ${JSON.stringify(CONFIG)}
`,
    );
  }
}