Cleanup Service

* Updated .env
+ Implemented automatical removal of old logs

.env.example

@@ -1,7 +1,20 @@
+#
+# All time references are in seconds
+#
+#
+############################################################
+
 # The frequency at which to fetch the temperature of ALL disks and add it to the database
 DISK_FETCH_FREQUENCY=5
 
+# How ofthen should the program clean the database of old logs
+CLEANUP_SERVICE_FREQUENCY=3600
+
 # The maximum age of logs in seconds
+# 1 Day = 86400
+# 1 Week = 604800
+# 1 Month ~= 2592000
+# Recommended 1 week
 MAX_HISTORY_AGE=2592000
 
 # The ip:port to listen to for the application