misc: set ddefault timezone to UTC

Author: saghul

env.example

@@ -40,12 +40,12 @@ HTTP_PORT=8000
 HTTPS_PORT=8443
 
 # System time zone
-TZ=Europe/Amsterdam
+TZ=UTC
 
 # Public URL for the web service
 #PUBLIC_URL=https://meet.example.com
 
-# IP address of the Docker host 
+# IP address of the Docker host
 # See the "Running behind NAT or on a LAN environment" section in the README
 #DOCKER_HOST_ADDRESS=192.168.1.1