added install docs

src/controllers/DocsController.php

@@ -13,6 +13,11 @@ class DocsController extends Controller
         return $this->render('index');
     }
 
+    public function actionInstall()
+    {
+        return $this->render('install');
+    }
+
     public function actionBowerFormat()
     {
         return $this->render('bower-format');

src/views/docs/index.php

@@ -12,12 +12,11 @@ $this->params['breadcrumbs'][] = $this->title;
 
     <h1><?= Html::encode($this->title) ?></h1>
 
-    <?php
-    echo Nav::widget([
+    <?= Nav::widget([
         'items' => [
+            ['label' => 'Installation', 'url' => ['/docs/install']],
             ['label' => 'bower.json Format', 'url' => ['/docs/bower-format']],
         ],
-    ]);
-    ?>
+    ]) ?>
 
 </div>

src/views/docs/install.php

@@ -0,0 +1,53 @@
+<?php
+
+/* @var $this yii\web\View */
+
+use yii\bootstrap\Nav;
+use yii\helpers\Html;
+
+$this->title = 'Installation';
+$this->params['breadcrumbs'][] = ['label' => 'Docs', 'url' => ['index']];
+$this->params['breadcrumbs'][] = $this->title;
+?>
+<div class="docs-install">
+
+    <h1><?= Html::encode($this->title) ?></h1>
+
+    <div class="row">
+        <div class="col-lg-4">
+            <h2>Windows</h2>
+
+            <ol>
+                <li>Download and install <a href="http://nodejs.org/">nodejs</a>.</li>
+                <li>Download and install <a href="http://git-scm.com/download/win">git</a>.</li>
+            </ol>
+
+            <p>Install bower</p>
+            <pre>C:\> npm install -g bower</pre>
+
+        </div>
+        <div class="col-lg-4">
+            <h2>Mac</h2>
+
+            <ol>
+                <li>Download and install <a href="http://nodejs.org/">nodejs</a>.</li>
+                <li>Download and install <a href="http://git-scm.com/download/mac">git</a>.</li>
+            </ol>
+
+            <p>Install bower</p>
+            <pre>$ npm install -g bower</pre>
+
+        </div>
+        <div class="col-lg-4">
+            <h2>Ubuntu/Debian</h2>
+
+            <p>Install nodejs, npm and git</p>
+            <pre>$ sudo apt-get install nodejs npm git-core</pre>
+
+            <p>Install bower</p>
+            <pre>$ npm install -g bower</pre>
+
+        </div>
+    </div>
+
+</div>

src/views/site/index.php

@@ -21,6 +21,8 @@ $this->params['jumbotron'] = '/site/_index-jumbotron';
                 <p>Bower requires <a href="http://nodejs.org/">Node and npm</a> and
                     <a href="http://git-scm.com/">Git</a>.</p>
 
+                <p><?= Html::a('detailed installation  &raquo;', ['/docs/install'], ['class' => 'btn btn-sm btn-default']); ?></p>
+
                 <h2>Configure Bower</h2>
 
                 <p>Create a