Added dotenv support to fanctl

fanctl.py

@@ -1,10 +1,18 @@
 #!/usr/bin/python3
 
+import os
+
+servo = 18
+
+if true: # set to false to skip using dotenv
+    from dotenv import load_dotenv
+    load_dotenv()
+    servo = int(os.getenv('FANCTL_SERVO_PIN'))
+
 import RPi.GPIO as IO
 import time
 import subprocess
 
-servo = 18
 
 IO.setwarnings(False)
 IO.setmode (IO.BCM)