Add logging

Author: iFargle

headscale.py

@@ -1,6 +1,6 @@
 # pylint: disable=wrong-import-order
 
-import requests, json, os
+import requests, json, os, logging
 from cryptography.fernet import Fernet
 from datetime            import timedelta, date
 from dateutil            import parser

helper.py

@@ -1,6 +1,6 @@
 # pylint: disable=wrong-import-order
 
-import os, headscale, requests
+import os, headscale, requests, logging
 from flask import Flask
 
 LOG_LEVEL = os.environ["LOG_LEVEL"].replace('"', '').upper()

renderer.py

@@ -1,6 +1,6 @@
 # pylint: disable=line-too-long, wrong-import-order
 
-import headscale, helper, pytz, os, yaml
+import headscale, helper, pytz, os, yaml, logging
 from flask              import Flask, Markup, render_template
 from datetime           import datetime
 from dateutil           import parser