- Updated error response

src/main/java/de/w665/sharepulse/rest/ErrorRestController.java

@@ -1,6 +1,8 @@
 package de.w665.sharepulse.rest;
 
 import org.springframework.boot.web.servlet.error.ErrorController;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -10,10 +12,19 @@ import org.springframework.web.bind.annotation.RestController;
 @RestController
 public class ErrorRestController implements ErrorController {
     @RequestMapping("/error")
-    public String handleError() {
-        return "<script>" +
+    public ResponseEntity<Object> handleError() {
+        String script =  "<script>" +
                     "console.log('Page not found. Redirecting to /home...');" +
                     "window.location.href = window.location.origin + '/home';" +
-                "</script>";
+                "</script>" +
+                "<h1>You've reached the default error page.</h1>" +
+                "<p>This could be caused by several reasons:</p>" +
+                "<ul>" +
+                    "<li>The page you are looking for does not exist.</li>" +
+                    "<li>The page you are looking for is not accessible.</li>" +
+                    "<li>The page you are looking for is not available at the moment.</li>" +
+                    "<li>The page you are looking for is not accessible without authentication.</li>" +
+                "</ul>";
+        return new ResponseEntity<>(script, HttpStatus.FOUND);
     }
 }