fix: add addkey.sh for setting nodekey

addkey.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+cd
+erbhome=".erbie/erbie"
+
+#read -p "Enter your private key or press 'ENTER' for none:" ky
+      echo -e "Enter your private key or press 'ENTER' for none: \c"
+        while : ;do
+                char=`
+                        stty cbreak -echo
+                        dd if=/dev/tty bs=1 count=1 2>/dev/null
+                        stty -cbreak echo
+                `
+                if [ "$char" =  "" ];then
+                        echo
+                        break
+                fi
+                PASS="$PASS$char"
+                echo -n "*"
+	done
+if [ -n "$PASS" ]; then
+        mkdir -p $erbhome
+        if [ ${#PASS} -eq 64 ];then
+
+                echo "$PASS" > $erbhome/nodekey
+        elif [ ${#PASS} -eq 66 ] && ([ ${PASS:0:2} == "0x" ] || [ ${PASS:0:2} == "0X" ]);then
+                echo ${PASS:2:64} > $erbhome/nodekey
+        else
+                echo "the nodekey format is not correct"
+                exit 1
+        fi
+fi