Add a conditional around the config file parsing attempt

src/Alertify/config.py

@@ -30,6 +30,7 @@ class Config:
         logging.debug('Parsing config')
         parsed = {}
 
+        if configfile is not None:
             try:
                 with open(configfile, 'r') as file:
                     parsed = yaml.safe_load(file.read())