Use dnsmasq and configure dns server config for clients

This will add a DNS config to the client configurations pointing to the
wireguard server. With this configuration, all DNS requests are sent
through the VPN and are no longer answered by the local DNS server.

Each client now has a hostname like <device>-client<id>.

scripts/create-config.sh

@@ -111,7 +111,6 @@ EOF
 done
 
 # Print out client configs
-
 for (( i=1; i<=$CLIENTS; i++ )); do
 cat <<EOF >> $DEVICE-client_$i.conf
 ##############
@@ -123,6 +122,7 @@ cat <<EOF >> $DEVICE-client_$i.conf
 Address = $NETWORK.$(($i+10))/24, $NETWORK6:$(printf "%x" $(($i+10)))/64
 ListenPort = $SERVER_PORT
 PrivateKey = ${CLIENT_SEC_KEYS[$i]}
+DNS = $NETWORK.1
 EOF
 
 if [ $MTU ]; then
@@ -138,3 +138,6 @@ Endpoint = $SERVER_HOST:$SERVER_PORT
 EOF
 
 done
+
+# Create dnsmasq hosts file
+/scripts/hosts.sh $NETWORK $NETWORK6