Update static/application.js

static/application.js

@@ -184,4 +184,8 @@ document.addEventListener("DOMContentLoaded", () => {
       sendMessage();
     }
   });
+    var backarrow = document.querySelector(".fa-arrow-left");
+    backarrow.addEventListener('click', function () {
+        window.location.href = '/';
+    });
 });