Add FCM VAPID key setup and update .gitignore

.gitignore

@@ -28,10 +28,9 @@
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
-.pnpm-debug.log*
 
-# env files (can opt-in for committing if needed)
-.env*
+# local env files
+.env*.local
 
 # vercel
 .vercel