Add documentation for contributing docs

site/content/en/docs/Contributing/documentation.en.md

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+---
+linkTitle: "Documentation"
+title: "Contributing to minikube documentation"
+date: 2019-07-31
+weight: 2
+---
+
+minikube's documentation is in [Markdown](https://www.markdownguide.org/cheat-sheet/), and generated using the following tools:
+
+* [Hugo](https://gohugo.io)
+* [Docsy](https://www.docsy.dev)
+
+In production, the minikube website is served using [Netlify](http://netlify.com/)
+
+## Local documentation website
+
+To serve documentation pages locally, clone the `minikube` repository and run:
+
+`make site`
+
+NOTE: On Windows, our site currently causes Hugo to `panic`.
+
+## Lint
+
+We recommend installing [markdownlint](https://github.com/markdownlint/markdownlint) to find issues with your markdown file. Once installed, you can use this handy target:
+
+`make mdlint`
+
+## Style Guidelines
+
+We follow the [Kubernetes Documentation Style Guide](https://kubernetes.io/docs/contribute/style/style-guide/)
+
+## Linking between documents
+
+For compile-time checking of links, use one of the following forms to link between documentation pages:
+
+
+```go-html-template
+{{</* ref "document.md" */>}}
+{{</* ref "#anchor" */>}}
+{{</* ref "document.md#anchor" */>}}
+{{</* ref "/blog/my-post" */>}}
+{{</* ref "/blog/my-post.md" */>}}
+{{</* relref "document.md" */>}}
+{{</* relref "#anchor" */>}}
+{{</* relref "document.md#anchor" */>}}
+```
+
+For more information, please see [Hugo: Links and Cross References](https://gohugo.io/content-management/cross-references/)
+
+## Pull Request Previews
+
+When reviewing documentation PR's, look for the test that says:
+
+**✓ deploy/netlify** Deploy preview ready! *Details*
+
+The `Details` link will point to a site preview URL in the form of:
+
+<https://deploy-preview-PR#--kubernetes-sigs-minikube.netlify.com>