Add sample page

source/pages/index.html

@@ -68,7 +68,7 @@
                         <li>
                             <span class="icon major regular fa-print"></span>
                             <h4>Print and Fold</h4>
-                            <p>Print the PDF we give you, fold it around your letter, and tape the edges to make a postage-paid envelope.</p>
+                            <p>Print the PDF we give you, fold it around your letter, and tape the edges to make a postage-paid envelope.<br /><a href="sample" target="_blank">See a sample</a></p>
                         </li>
                         <li>
                             <span class="icon major regular fa-mailbox"></span>

source/pages/sample.md

@@ -0,0 +1,8 @@
+// title Sample Envelope
+
+Here's what you're buying when you use this service. It might look a little different depending on 
+the options you choose. Click the image to get a PDF for a test print.
+
+<a href="{{site_root}}sample.pdf">
+    <img src="{{site_root}}sample.png" alt="Sample" style="border: 1px solid #aaa; box-shadow: 0 3px 10px rgb(0 0 0 / 0.2); max-width: 100%;"/>
+</a>