Add root pages for docs, update h2 to h1 tags

content/os/v1.x/en/installation/boot-process/_index.md

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+---
+title: Boot Process
+weight: 100
+---

content/os/v1.x/en/installation/custom-builds/_index.md

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+---
+title: Custom Builds
+weight: 100
+---

content/os/v1.x/en/installation/networking/_index.md

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+---
+title: Networking
+weight: 100
+---

content/os/v1.x/en/installation/running-rancheros/cloud/_index.md

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+---
+title: Cloud
+weight: 100
+---

content/os/v1.x/en/installation/running-rancheros/server/_index.md

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+---
+title: Server
+weight: 100
+---

content/os/v1.x/en/installation/running-rancheros/workstation/_index.md

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+---
+title: Workstation
+weight: 100
+---

content/os/v1.x/en/installation/storage/_index.md

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+---
+title: Storage
+weight: 100
+---

content/os/v1.x/en/installation/system-services/_index.md

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+---
+title: System Services
+weight: 100
+---

content/rancher/v2.x/en/_index.md

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 ctaBanner: intro-k8s-rancher-online-training
 ---
 
-## What's New?
+# What's New?
 
 Rancher was originally built to work with multiple orchestrators, and it included its own orchestrator called Cattle. With the rise of Kubernetes in the marketplace, Rancher now exclusively deploys and manages multiple Kubernetes clusters running anywhere, on any provider. It can provision Kubernetes from a hosted provider, provision compute nodes and then install Kubernetes onto them, or inherit existing Kubernetes clusters running anywhere.