added web interface

src/web/css/index.css

@@ -0,0 +1,13 @@
+* {
+    margin: 0;
+    padding: 0;
+    box-sizing: border-box;
+}
+
+body {
+    width: 100vw;
+    height: 100vh;
+    background-color: black;
+    color: white;
+    position: relative;
+}