Put nmap example into its own dir and add Dockerfile

poc/examples/nmap.pow

@@ -1,19 +0,0 @@
-#!/bin/bash
-
-#
-# Copyright 2019 Banco Bilbao Vizcaya Argentaria, S.A.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-kroute add -X POST '/list/{ip}' -c 'nmap -sL $(request /match/ip) | response /body'