added mit license, updated nginx Dockerfiles

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Bret Fisher
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

dockerfile-sample-1/Dockerfile

@@ -8,8 +8,8 @@ FROM debian:stretch-slim
 # usually from a minimal Linux distribution like debain or (even better) alpine
 # if you truly want to start with an empty container, use FROM scratch
 
-ENV NGINX_VERSION 1.13.1-1~stretch
-ENV NJS_VERSION   1.13.1.0.1.10-1~stretch
+ENV NGINX_VERSION 1.13.6-1~stretch
+ENV NJS_VERSION   1.13.6.0.1.14-1~stretch
 # optional environment variable that's used in later lines and set as envvar when container is running
 
 RUN apt-get update \