Remove requirement to manually start fastcgi and nginx

Added an entrypoint script that simply tails the packages.config file after starting nginx and fastcgi

The container can be started with everything running using
`docker run  -t -i -p 8090:80 <repository name>`

To start the container into shell mode as before use
`docker run  -t -i -p 8090:80 --entrypoint /bin/bash <repository name>`