Add logs and block for templates

templates/errors_block.html

@@ -0,0 +1,8 @@
+{% if error_messages %}
+    {% for error in error_messages %}
+        <div class="alert alert-danger alert-dismissible" role="danger">
+          <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+          <strong>Error:</strong> {{ error }}
+        </div>
+    {% endfor %}
+{% endif %}