section-7: Configure default rem to 10px.

Author: owen-webb

starter/07-Omnifood-Desktop/css/style.css

@@ -39,6 +39,10 @@ SPACING SYSTEM (px)
   margin: 0;
 }
 
+html {
+  font-size: 62.5%;
+}
+
 body {
   color: #555;
   font-family: sans-serif;