Merge pull request #2 from wcbzero/feature/docker

Feature/docker

Dockerfile

@@ -0,0 +1,4 @@
+FROM php:5.6-apache
+
+COPY index.php gennum.php subnets.html /var/www/html/
+COPY img/* /var/www/html/img/

README.md

@@ -1,2 +1,10 @@
 # subnets
 Visual subnet calculator as seen at http://www.davidc.net/sites/default/subnets/subnets.html
+
+# Run with docker
+
+```
+cd <project folder>
+docker build . -t subnets
+docker run -d -p 5001:80 --name subnets subnets
+```

index.php

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+<?php
+header("Location: subnets.html");