added more env config options

.env.example

@@ -1,2 +1,4 @@
 NTFY_Token=
 device_name=
+logging_level=DEBUG
+shutdown_timer=30

main.py

@@ -6,7 +6,10 @@ import logging
 
 ##########################################
 #Logging
+if os.environ['logging_level'] == "DEBUG":
     loglevel = logging.DEBUG
+elif os.environ['logging_level'] == "INFO":
+    loglevel = logging.INFO
 logger = logging.getLogger('Power Monitor')
 logger.setLevel(loglevel)
 #Console Handler
@@ -23,7 +26,7 @@ load_dotenv()
 
 ntfy_token = os.environ['NTFY_Token']
 device_name = os.environ['device_name']
-shutdown_timer = 30
+shutdown_timer = int(os.environ['shutdown_timer'])
 
 with serial.Serial(device_name, 115200, timeout=1) as ser:
     inverter_offline_counter = 0