Display last updated time

src/main.rs

@@ -97,6 +97,8 @@ fn main() -> Result<()> {
 
     out.push_str("</ul>\n");
 
+    out.push_str(&format!("<small>Last updated: {}</small>", chrono::Utc::now()));
+
     out.push_str("</body>\n");
     out.push_str("</html>\n");