Re-adding force flag to ln command

Else the script will fail if the links are already there and not
rotate the preshared.key.

Also now write out a new preshared.key before creating the links
just in case that flag gets lost again.

tools/create-vpn-keys.sh

@@ -32,9 +32,9 @@ for i in $MONITORING_IPS $VPNSERVER_IP; do
   wg genkey | tee "${VPN_SECRETS}"/${i}.key | wg pubkey > "${VPN_SECRETS}"/${i}.pub
 done
 
-ln -s $VPNSERVER_IP.key "${VPN_SECRETS}"/server.key
-ln -s $VPNSERVER_IP.pub "${VPN_SECRETS}"/server.pub
-
 wg genpsk > "${VPN_SECRETS}"/preshared.key
 
+ln -fs $VPNSERVER_IP.key "${VPN_SECRETS}"/server.key
+ln -fs $VPNSERVER_IP.pub "${VPN_SECRETS}"/server.pub
+
 # EOF