Init doc page

Squashed commit of the following:

commit adff177ad2e3fc9d73bcf9703c7443ae33922dca
Author: Yandex.Cloud Bot <ycloud-bot@yandex.ru>
Date:   Tue Mar 26 20:52:08 2019 +0000

    sync upstream

website/source/docs/builders/yandex.html.md

@@ -0,0 +1,53 @@
+---
+description: |
+    The yandex Packer builder is able to create images for use with 
+    Yandex.Cloud based on existing images.
+layout: docs
+page_title: 'Yandex Compute - Builders'
+sidebar_current: 'docs-builders-yandex'
+---
+
+# Yandex Compute Builder
+
+Type: `yandex`
+
+The `yandex` Packer builder is able to create
+[images](https://cloud.yandex.com/docs/compute/concepts/images) for use with
+[Yandex Compute Cloud](https://cloud.yandex.com/docs/compute/)
+based on existing images.
+
+## Authentication
+
+FIXME
+
+## Basic Example
+
+FIXME
+
+``` json
+{
+  "builders": [
+  FIXME
+  ]
+}
+```
+
+## Configuration Reference
+
+Configuration options are organized below into two categories: required and
+optional. Within each category, the available options are alphabetized and
+described.
+
+In addition to the options listed here, a
+[communicator](/docs/templates/communicator.html) can be configured for this
+builder.
+
+### Required:
+
+FIXME
+
+### Optional:
+
+FIXME
+
+

website/source/layouts/docs.erb

@@ -54,7 +54,7 @@
         <a href="/docs/builders/index.html">Builders</a>
         <ul class="nav">
           <li<%= sidebar_current("docs-builders-alicloud") %>>
-             <a href="/docs/builders/alicloud-ecs.html">Alicloud ECS</a>
+            <a href="/docs/builders/alicloud-ecs.html">Alicloud ECS</a>
           </li>
           <li<%= sidebar_current("docs-builders-amazon") %>>
             <a href="/docs/builders/amazon.html">Amazon EC2</a>
@@ -100,10 +100,10 @@
             <a href="/docs/builders/googlecompute.html">Google Cloud</a>
           </li>
           <li<%= sidebar_current("docs-builders-hetzner-cloud") %>>
-             <a href="/docs/builders/hetzner-cloud.html">Hetzner Cloud</a>
+            <a href="/docs/builders/hetzner-cloud.html">Hetzner Cloud</a>
           </li>
           <li<%= sidebar_current("docs-builders-hyperone") %>>
-             <a href="/docs/builders/hyperone.html">HyperOne</a>
+            <a href="/docs/builders/hyperone.html">HyperOne</a>
           </li>
           <li<%= sidebar_current("docs-builders-hyperv") %>>
             <a href="/docs/builders/hyperv.html">Hyper-V</a>
@@ -196,6 +196,9 @@
               </li>
             </ul>
           </li>
+          <li<%= sidebar_current("docs-builders-yandex") %>>
+            <a href="/docs/builders/yandex.html">Yandex.Cloud</a>
+          </li>
           <li<%= sidebar_current("docs-builders-custom") %>>
             <a href="/docs/builders/custom.html">Custom</a>
           </li>
@@ -261,7 +264,7 @@
         <a href="/docs/post-processors/index.html">Post-Processors</a>
         <ul class="nav">
           <li<%= sidebar_current("docs-post-processors-alicloud-import") %>>
-              <a href="/docs/post-processors/alicloud-import.html">Alicloud Import</a>
+            <a href="/docs/post-processors/alicloud-import.html">Alicloud Import</a>
           </li>
           <li<%= sidebar_current("docs-post-processors-amazon-import") %>>
             <a href="/docs/post-processors/amazon-import.html">Amazon Import</a>