title: Firebase for chat message alert (push notification)
body: <p>I am developing a chat app using firebase real-time database. I am able to exchange messages but i want to have a message alert notification for new messages. 
  Sending notifications using firebase console is working but now i want to automate it without firebase console.</p>
  
  <p>Do i need to create my own app server for push notification between android clients? Or is there another way to achieve this instead of creating a server?</p>
  
  <p>Thank you</p>