buidl out some basic functionality

views/dashboard.php

@@ -43,7 +43,7 @@ $content = function() { /* use ($bills) if fetching bills from the database */
                                 <span aria-hidden="true">&times;</span>
                             </button>
                         </div>
-                        <form action="/add-bill" method="post">
+                        <form id="addBillForm">
                             <div class="modal-body">
                                 <div class="form-group">
                                     <label for="description">Description</label>

views/layouts/app.php

@@ -21,6 +21,12 @@
     </nav>
 
     <div class="container">
+        <?php if (isset($error) && !empty($error)): ?>
+            <div class="alert alert-danger" role="alert">
+                <?php echo $error; ?>
+            </div>
+        <?php endif; ?>
+
         <?php if (isset($content) && is_callable($content)) $content(); ?>
     </div>