fix app host

constants.py

@@ -2,7 +2,7 @@
 
 APP_NAME = "flaskblog"  # NAME OF THE FLASK APP.
 APP_ROOT_PATH = "."  # THE PATH TO THE ROOT OF THE APP FILES.
-APP_HOST = "localhost"
+APP_HOST = socket.gethostbyname(socket.gethostname()) # OR USE "localhost" 
 APP_PORT = 8080  # FLASK APP'S HOST/PORT.
 DEBUG_MODE = True  # TURN ON/OFF FLASK DEBUG MODE.
 TAILWIND_UI = False  # SELECT TAILWIND-UI/STANDARD-UI.