Service worker issue

[bart-sofomo]

Hello,
I'm using https://serwist.pages.dev/ for service worker where I have a code like this:

const firebaseApp = initializeApp({
  apiKey: env.NEXT_PUBLIC_FIREBASE_API_KEY,
  authDomain: env.NEXT_PUBLIC_FIREBASE_AUTH_DOMAIN,
  projectId: env.NEXT_PUBLIC_FIREBASE_PROJECT_ID,
  storageBucket: env.NEXT_PUBLIC_FIREBASE_STORAGE_BUCKET,
  messagingSenderId: env.NEXT_PUBLIC_FIREBASE_MESSAGING_SENDER_ID,
  appId: env.NEXT_PUBLIC_FIREBASE_APP_ID,
});

The problem is that it seems like bundling a service worker is a really specific case and somehow when I use env. instead of process.env the browser is claiming invalid variables for those that are used in server side. What I think is happening is service worker when importing env tries to access server side variables which are not available during build time (skipValidation: true on build).

Is there any way to fix this or should I simply not import env in service worker?