add contact page

web/src/index.css

@@ -0,0 +1,17 @@
+
+button, input, label, textarea {
+  display: block;
+  outline: none;
+}
+
+label {
+  margin-top: 1rem;
+}
+
+.error {
+  color: red;
+}
+
+input.error, textarea.error {
+  border: 1px solid red;
+}