Doc index created

Author: eiximenis

README.ENV.md readme/README.ENV.mdREADME.ENV.md renamed to readme/README.ENV.md

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+# Documentation index
+
+This file contains links to the documentation of the project.
+
+* **Wiki**: The wiki contains detailed step-by-step information about how to set up the project. Read it at: [https://github.com/dotnet-architecture/eShopOnContainers/wiki](https://github.com/dotnet-architecture/eShopOnContainers/wiki)
+
+## Documentation included in files
+
+* [Branch Guide](../branch-guide.md): List of branches used and their purpose.
+* [vsts-docs folder](.,/vsts-docs/readme.md): Information about how to setup a CI/CD procedure using VSTS
+* [Kubernetes](,./k8s/readme.md): Information about how to deploy eShopOnContainers in a kubernetes cluster, and how to setup a CI/CD for k8s using VSTS
+* [deploy](../deploy/readme.md): Information about how deploy Azure resources using the Azure CLI 2.0.
+* [.env file](./README.ENV.md): What is the `.env` file and how to use it to configure eShopOnContainers to use external resources (like Azure)
+
+## Docs folder
+
+The `/docs` folder contains the pdfs versions of the books
+