if user.json exists but empty then add content not append

deploy.sh

@@ -260,8 +260,12 @@ for i in $(echo $PROXY_TYPE); do
         		if [[ -f $USER_CONFIG_PATH ]]; then
         			TARGET=$(cat $USER_CONFIG_PATH | head -n-2);
                 		{
-                        	echo $TARGET
+				if [ "$TARGET" != "" ]; then
-                        	echo "},"
+					echo $TARGET
+					echo "},"
+				else
+					echo "{";
+				fi;
 				echo $LETS_CONTENT
 				echo "}"
 				} >> "$TMP_FILE";