Added messages history

src/script.js

@@ -36,6 +36,12 @@ document.addEventListener("DOMContentLoaded", () => {
             addMessage("Rappel", "Vous devez parler uniquement de denis !");
         });
 
+        socket.on("previous-messages", (data) => {
+            data.messages.forEach(message => {
+                addMessage(message[0], message[1]);
+            });
+        });
+
 
     } catch(error) {
         document.getElementById("value").innerText = "Serveur injoingnable !";