Updated docker stuff

rails-dev.sh

@@ -0,0 +1,11 @@
+#!/bin/bash -e
+
+if [ $# != 1 ]; then
+  echo "Please enter docker image name for the rails development environment"
+  exit 1
+fi
+
+APPPATH="$(pwd)"
+
+docker build -t $1 -f rails-dev-Dockerfile .
+docker run -it -p 3000:3000 -v ${APPPATH}:/rails $1 /bin/bash