feat: scroll down on new messages

main.js

@@ -114,6 +114,9 @@ function addMessage(idx) {
     let message = conversation[idx];
     let messageHtml = getMessageHtml(message.text, isMessageOurs(message));
     getMessageList().innerHTML += messageHtml;
+    
+    // scroll as far as we can so that messages aren't hidden
+    window.scrollTo(0, document.body.scrollHeight);
 }
 
 function getMessageHtml(text, isOurs) {