Update docker-compose example (#343)

Author: mgdigital

docker-compose.yml

@@ -45,6 +45,9 @@ services:
       # Put your personal gluetun/VPN account config and credentials here:
       # (See https://github.com/qdm12/gluetun-wiki/tree/main/setup/providers)
       - VPN_SERVICE_PROVIDER=your_vpn_provider
+    devices:
+      # See https://github.com/qdm12/gluetun/issues/2538
+      - /dev/net/tun:/dev/net/tun
     restart: always
     # Host names must be manually mapped here for bitmagnet to resolve them:
     extra_hosts: