add dn42 disclaimer

src/main.rs

@@ -51,11 +51,11 @@ fn post_guest_message(name: &str, body: &str) {
     let messages = guest_json["messages"]
         .as_array_mut()
         .expect("Object is not an array?");
-    let date = Local::now().format(DATE_TIME_FORMAT);
+    let date = Local::now();
     messages.push(json!({
         "name": name,
         "body": body,
-        "date": date.to_string(),
+        "date": date.timestamp(),
     }));
     let mut file = File::create(GUEST_MESSAGES).expect("Couldn't read msgs");
     file.write_all(guest_json.to_string().as_bytes()).expect("wah");