📝 Add link to Docker documentation section

This commits adds a link to excellent talk about
ASP.NET 5 (.NET Core) and Docker including basics,
advanced optimization and composing - all in context
of .NET cross-platform development with generator based
workflow

Thanks!

Author: peterblazejewicz

README.md

@@ -269,6 +269,7 @@ Are you curious about Docker, Linux containers and ASP.NET 5 Docker image and al
 - [Docker image for ASP.NET 5 (Docker Hub)](https://hub.docker.com/r/microsoft/aspnet/)
 - [Running ASP.NET 5 applications in Linux Containers with Docker (MSDN)](http://blogs.msdn.com/b/webdev/archive/2015/01/14/running-asp-net-5-applications-in-linux-containers-with-docker.aspx)
 - [ASP.NET 5 : Continuous Integration with Travis-CI, Tutum, Docker, Webhooks and Azure [Advanced]](http://tattoocoder.com/asp-net-5-continuous-integration-with-travis-ci-tutum-docker-webhooks-and-azure/)
+- [ASP.NET 5 on Docker talk at NDC {London}](https://vimeo.com/154588594) by [Mark Rendle](https://twitter.com/markrendle)
 
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