Added error to post page

javascript/post.js

@@ -19,7 +19,14 @@ fetch("/pages/blog/"+search+".json").then(response => response.json()).then(data
         postBody.innerHTML = data.postText;
     }
     
-}).catch(error => console.error("Error Fetching Json"));
+}).catch((error) => {
+    postTitle = document.getElementById("postTitle");
+    postSubTitle = document.getElementById("postSubTitle");
+    postText = document.getElementById("postText");
+    postTitle.textContent = "Error fetching post";
+    postSubTitle.textContent = "What happened?"
+    postText.textContent = "You were trying to look for " + document.location.search + " Is this correct?"
+});