Get timezone from .env

SEPTREFHUM.py

@@ -52,10 +52,7 @@ tmpfile_path = "tmp/"
 # Names of weather parameters in NetCDF files
 RR = os.getenv("RR")
 UM = os.getenv("UM")
-
-
-# TODO: Make this configurable (.env)
-local_timezone = pytz.timezone("Europe/Oslo")
+local_timezone = pytz.timezone(os.getenv("LOCAL_TIMEZONE"))
 
 # Iterate the set of hourly weather data files
 # 1. When's the latest wh_[DATE].nc file? - set earliest weather data file: start_date = [DATE]-2 days