add wireguard vpn service and randomize script

network/wg-randomize.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+ln -sf "$(find /etc/wireguard -maxdepth 1 -name '*.conf' ! -name 'wg0.conf' | shuf -n1)" /etc/wireguard/wg0.conf

services/wg-randomize.service

@@ -0,0 +1,11 @@
+[Unit]
+Description=Randomize WireGuard config on shutdown
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/bin/true
+ExecStop=/home/lucas/scripts/network/wg-randomize.sh
+
+[Install]
+WantedBy=multi-user.target