correction to work with first peer

README.md

@@ -3,7 +3,7 @@
 ## Server
 ```sh
 pkg_add wireguard-tools
-pkg_add qrencode #optional
+pkg_add libqrencode #optional
 sh wireguard_server.sh
 ```
 ### For each client

wireguard_client.sh

@@ -14,11 +14,16 @@ client=$1
 server_ip=$(curl ipinfo.io/ip)
 interface="wg0"
 config_file="/etc/wireguard/${interface}.conf"
+interface_config_file="/etc/hostname.${interface}"
 clients_dir="/etc/wireguard/clients"
 server_port=$(grep "ListenPort" ${config_file} | awk '{print $3}')
 
 last_ip=$(tail -n 1 ${config_file} |\
 		grep -oE "([0-9]{1,3}\.){3}[0-9]{1,3}")
+if ! [ -n "$last_ip" ]; then
+    # if it's the first peer, config file don't have any IP
+    last_ip=$(head -n 1 ${interface_config_file} | grep -oE "([0-9]{1,3}\.){3}[0-9]{1,3}" | head -n 1)
+fi
 new_ip=$(echo "$last_ip" | awk -F. '{print $1"."$2"."$3"."$4+1}')
 client_ip="${new_ip}/32"