Center images in figures

content/tank.md

@@ -9,6 +9,8 @@ trains or on mountains (not to be confused with [mountain](./mountain.html)).
 I now try to bring it with me and use it wherever, just to add to the list on
 this page.
 
+![tank in tablet mode, used to browse a PostgreSQL database while standing in a square](img/tank.jpg)
+
 ## Specifications
 
 * Birth date: 2011-03-13

html_assets/theme.css

@@ -55,10 +55,15 @@ th, td {
 th {
   background-color: #0f498c;
 }
-figcaption {
+figure, figcaption {
   text-align: center;
+}
+figcaption {
   font-style: italic;
 }
+figure pre, figure code {
+  text-align: left;
+}
 
 #meta-header {
   background-color: black;