Add link back to repo from demo pages.

_includes/layouts/base.njk

@@ -22,8 +22,7 @@
 			{{ layoutContent | safe }}
 		</main>
 
-		<footer>
-		</footer>
+		<footer></footer>
 
 		<!-- Current page: {{ page.url | url }} -->
 	</body>

css/index.css

@@ -17,6 +17,9 @@ body {
 	margin: 0;
 	font-family: sans-serif;
 }
+p:last-child {
+	margin-bottom: 0;
+}
 p,
 .tmpl-post li,
 img {

index.njk

@@ -10,6 +10,7 @@ navtitle: Home
 		<li>(Optional) Edit <code>.eleventy.js</code> with your configuration preferences.</li>
 		<li>Delete this message from <code>index.njk</code>.</li>
 	</ol>
+	<p><em>This is an <a href="https://www.11ty.io/">Eleventy project</a> created from the <a href="https://github.com/11ty/eleventy-base-blog"><code>eleventy-base-blog</code> repo</a>.</em></p>
 </div>
 
 {% set postslist = collections.posts %}