Added simple web page, routes are in a separate file

static/css/style.css

@@ -0,0 +1,31 @@
+body {
+    height: 100vh;
+    padding: 0;
+    margin: 0;
+    font-family: sans-serif;
+
+    display: flex;
+    flex-direction: column;
+    justify-content: space-between;
+    align-items: center;
+
+    background: #fff;
+    color: #000;
+}
+
+@media (prefers-color-scheme: dark) {
+    body {
+        background: #202023;
+        color: #eee;
+    }
+}
+
+header { margin-top: 5px; }
+footer { margin-bottom: 5px; }
+
+a {
+    color: #5b8a55;
+}
+a:hover {
+    filter: brightness(120%);
+}