diff --git a/.env.sample b/.env.sample
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+# sentry
+REACT_APP_SENTRY_DSN=
+
+# google analytics id
+REACT_APP_GOOGLE_ANALYTICS_ID=
+
+# firebase
+REACT_APP_FIREBASE_API_KEY=
+REACT_APP_FIREBASE_AUTH_DOMAIN=
+REACT_APP_FIREBASE_DATABASE_URL=
+REACT_APP_FIREBASE_PROJECT_ID=
+REACT_APP_FIREBASE_STORAGE_BUCKET=
+REACT_APP_FIREBASE_MESSAGING_SENDER_ID=
+REACT_APP_FIREBASE_APP_ID=
+REACT_APP_FIREBASE_MEASUREMENT_ID=
+
+REACT_APP_FIREBASE_WEB_PUSH_CERTIFICATES=
+
+# stripe
+REACT_APP_STRIPE_TEST_API_KEY=
+REACT_APP_STRIPE_API_KEY=