Add bold font face

assets/css/styles.scss

@@ -22,7 +22,8 @@ $navbar-dropdown-item-hover-background-color: white;
 
 @font-face {
 	font-family: 'DejaVuSans';
-	src: url('/assets/fonts/DejaVuSans-webfont.woff')
+	src: url('/assets/fonts/DejaVuSans-webfont.woff');
+	font-weight: 400;
 }
 
 @font-face {
@@ -30,6 +31,12 @@ $navbar-dropdown-item-hover-background-color: white;
 	src: url('/assets/fonts/DejaVuSansMono-webfont.woff')
 }
 
+@font-face {
+	font-family: 'DejaVuSans';
+	src: url('/assets/fonts/DejaVuSansBold-webfont.woff');
+	font-weight: 700;
+}
+
 html {
   scroll-padding-top: 5.6rem; /* height of sticky header plus margins */
 }