diff --git a/.gitignore b/.gitignore
index c87c9b3..5ffef92 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,6 +19,7 @@
 .DS_Store
 *.pem
 
+
 # debug
 npm-debug.log*
 yarn-debug.log*
@@ -27,6 +28,7 @@ yarn-error.log*
 
 # local env files
 .env*.local
+.env
 
 # vercel
 .vercel
diff --git a/README.md b/README.md
index eb69950..40003de 100644
--- a/README.md
+++ b/README.md
@@ -6,3 +6,13 @@ This app functions as a flyer for the apartment in Altenau. It has no booking fu
 
 We use Firebase for the backend. The app is configured to use the Firebase project `altenau-apartment`.  
 Texts based on languages are stored in the `localeTexts` collection. Since NextJS caches the HTML file its not bad to always fetch the texts from the database.
+
+## .env file
+
+FIREBASE_API_KEY=""
+FIREBASE_AUTH_DOMAIN=""
+FIREBASE_PROJECT_ID=""
+FIREBASE_STORAGE_BUCKET=""
+FIREBASE_MESSAGING_SENDER_ID=""
+FIREBASE_APP_ID=""
+FIREBASE_MEASUREMENT_ID=""
diff --git a/firebase-config.js b/firebase-config.js
index b02e3f5..04aae78 100644
--- a/firebase-config.js
+++ b/firebase-config.js
@@ -2,15 +2,25 @@ import { getFirestore } from "@firebase/firestore";
 import { initializeApp } from "firebase/app";
 
 const firebaseConfig = {
-	apiKey: "AIzaSyBpj2FZEONb_Qpca4-brCzB0OVJPf3l8hk",
-	authDomain: "apartment-f960a.firebaseapp.com",
-	projectId: "apartment-f960a",
-	storageBucket: "apartment-f960a.appspot.com",
-	messagingSenderId: "1007134515151",
-	appId: "1:1007134515151:web:9ff0216c618b55a571bcba",
-	measurementId: "G-RMSZVM1BCG",
+	apiKey: process.env.FIREBASE_API_KEY,
+	authDomain: process.env.FIREBASE_AUTH_DOMAIN,
+	projectId: process.env.FIREBASE_PROJECT_ID,
+	storageBucket: process.env.FIREBASE_STORAGE_BUCKET,
+	messagingSenderId: process.env.FIREBASE_MESSAGING_SENDER_ID,
+	appId: process.env.FIREBASE_APP_ID,
+	measurementId: process.env.FIREBASE_MEASUREMENT_ID,
 };
 
+console.log({
+	apiKey: process.env.FIREBASE_API_KEY,
+	authDomain: process.env.FIREBASE_AUTH_DOMAIN,
+	projectId: process.env.FIREBASE_PROJECT_ID,
+	storageBucket: process.env.FIREBASE_STORAGE_BUCKET,
+	messagingSenderId: process.env.FIREBASE_MESSAGING_SENDER_ID,
+	appId: process.env.FIREBASE_APP_ID,
+	measurementId: process.env.FIREBASE_MEASUREMENT_ID,
+});
+
 const app = initializeApp(firebaseConfig);
 
 export const db = getFirestore();