Add 404 pg

Author: lunacodes

content/404.html

@@ -0,0 +1,35 @@
+---
+permalink: /404.html
+layout: default
+class: page-short
+---
+
+<style type="text/css" media="screen">
+  .container {
+    text-align: center;
+  }
+
+  .container-404 {
+    margin: 10px auto;
+    max-width: 600px;
+    text-align: center;
+  }
+
+  h1 {
+    margin: 30px 0;
+    font-size: 4em;
+    line-height: 1;
+    letter-spacing: -1px;
+  }
+
+  p {
+    font-size: 1rem;
+  }
+
+</style>
+
+<div class="container-404">
+  <h1>404</h1>
+  <p><strong>Page not found :(</strong></p>
+  <p>The requested page could not be found. Please visit our <a href="{{ site.url | absolute_url }}">homepage</a> instead.</p>
+</div>