first commit

templates/include/error.html.twig

@@ -0,0 +1,13 @@
+        {% for message in app.flashes('error') %}
+            <div class="alert alert-danger mt-3">
+                {{ message }}
+            </div>
+        {% endfor %}
+
+        {% if form.vars.errors is not empty %}
+            <div class="alert alert-danger mt-3">
+                {% for error in form.vars.errors %}
+                    <li>{{ error.message }}</li>
+                {% endfor %}
+            </div>
+        {% endif %}