print credentials to runtime cmd line..

app.py

@@ -23,6 +23,12 @@ RPI_PORT = int(os.environ.get("RPI_PORT", 1883))
 RPI_USERNAME = os.environ.get("RPI_USERNAME", "default_user")
 RPI_PASSWORD = os.environ.get("RPI_PASSWORD", "default_pass")
 
+print(BAMBU_HOST)
+print(BAMBU_PORT)
+print(BAMBU_USERNAME)
+print(BAMBU_PASSWORD)
+print(DEFAULT_SERIAL)
+
 latest_data = {}