added image bounding for posts

src/styles.scss

@@ -100,4 +100,9 @@ span.linenos.special { color: #979797; background-color: #ffffc0; padding-left:
 
 * a:hover {
     color: colors.$inklets-color-highlight-fg;
+}
+
+* img {
+    max-width: 400px;
+    max-height: 500px;
 }
\ No newline at end of file