refactor: move add tunnel to function

install.sh

@@ -25,15 +25,16 @@ else
     [ -f /etc/config/dhcp-opkg ] && cp /etc/config/dhcp /etc/config/dhcp-old && mv /etc/config/dhcp-opkg /etc/config/dhcp
 fi
 
-echo "What type of VPN or proxy will be used?"
-echo "1) VLESS, Shadowsocks (A sing-box will be installed)"
-echo "2) Wireguard"
-echo "3) AmneziaWG"
-echo "4) OpenVPN"
-echo "5) OpenConnect"
-echo "6) Skip this step"
+add_tunnel() {
+    echo "What type of VPN or proxy will be used?"
+    echo "1) VLESS, Shadowsocks (A sing-box will be installed)"
+    echo "2) Wireguard"
+    echo "3) AmneziaWG"
+    echo "4) OpenVPN"
+    echo "5) OpenConnect"
+    echo "6) Skip this step"
 
-while true; do
+    while true; do
         read -r -p '' TUNNEL
         case $TUNNEL in
 
@@ -92,7 +93,10 @@ while true; do
             echo "Choose from the following options"
             ;;
         esac
-done
+    done
+}
+
+add_tunnel
 
 echo "Installed podkop..."
 opkg install $DOWNLOAD_DIR/podkop*.ipk