Add the exit interrupt and the exit message.

notification_client/MessagePrinter.py

@@ -10,3 +10,10 @@ class MessagePrinter:
 
         console.print(Markdown(full_message))
 
+
+    @staticmethod
+    def bye():
+        console = Console()
+
+        console.print('[green]bye[/]')
+

notification_client/cli.py

@@ -18,7 +18,10 @@
 ###############################################################################
 
 import asyncio
+import sys
 import typer
+from notification_client.MessagePrinter import MessagePrinter
+
 from notification_client.client import Client
 
 cli_app = typer.Typer(rich_markup_mode="rich")
@@ -40,5 +43,9 @@ def up(
     This command [b]start[/] the [yellow b]client[/] and connects to the notification server.
     """
 
+    try:
         client = Client(ip, port)
         asyncio.run(client.connect())
+    except KeyboardInterrupt:
+        MessagePrinter.bye()
+        sys.exit(0)