add attribution to about page photo

_sass/_article.scss

@@ -14,7 +14,7 @@
 
 .post p {
   text-align: justify;
-  text-indent: 1.5rem;
+  text-indent: 1.5em;
   text-justify: inter-word;
 }
 
@@ -23,12 +23,8 @@
   text-indent: 0;
 }
 
-.post img {
+.post p img {
   margin-left: -1em;
-  display: flex;
-  max-width: 100%;
-  height: auto;
-  margin: 2em auto;
 }
 
 .post li {

_sass/_base.scss

@@ -54,7 +54,7 @@ blockquote {
   margin: 2em auto;
   opacity: .8;
   > * {
-    padding: 0 1.5em;
+    padding: 0 3em;
   }
 }
 
@@ -78,6 +78,25 @@ hr {
   margin: 4em 0;
 }
 
+img {
+  display: flex;
+  max-width: 100%;
+  height: auto;
+  margin: 2em auto;
+}
+
+figure img {
+  margin: 2em auto 1em;
+}
+
+figcaption {
+  font-size: .875em;
+  font-style: italic;
+  text-align: center;
+  margin-bottom: 2em;
+  opacity: .7;
+}
+
 .divided::after {
   content: "";
   @include divider;

about.md

@@ -5,7 +5,12 @@ title: About
 
 Undoubtably one of the great minds of our time, Christopher Hitchens challenged his readers to think deeply on topics of politics, religion, war, and science. This Jekyll theme is designed in his memory.
 
-![Christopher Hitchens](https://upload.wikimedia.org/wikipedia/commons/6/63/Christopher_Hitchens_2008-04-24_001.jpg)
+<figure>
+  <img alt="Christopher Hitchens" src="https://upload.wikimedia.org/wikipedia/commons/6/63/Christopher_Hitchens_2008-04-24_001.jpg" />
+  <figcaption>
+    Photo by Fri Tanke and licensed under the <a href="https://creativecommons.org/licenses/by/3.0/deed.en">Creative Commons Attribution 3.0 Unported</a> license.
+  </figcaption>
+</figure>
 
 From [Wikipedia](https://en.wikipedia.org/wiki/Christopher_Hitchens):