Update docker-v3.sh

ct/docker-v3.sh

@@ -77,7 +77,7 @@ function default_settings() {
 		echo -e "${DGN}Using ${BGN}2048MiB${CL}${DGN} RAM${CL}"
 		RAM_SIZE="2048"
 		echo -e "${DGN}Using Bridge ${BGN}${BRG}${CL}"
-		
+		BRG="vmbr0"
 		echo -e "${DGN}Using Static IP Address ${BGN}DHCP${CL}"
                 NET=dhcp
 		echo -e "${DGN}Using Gateway Address ${BGN}NONE${CL}"