Message types and server (#44)

* message type and handling

* deleted web-content and fixed bug

* edited main page

Frontend/src/pages/OnlineGameList.vue

@@ -0,0 +1,14 @@
+<script setup lang="ts">
+
+</script>
+
+<template>
+
+  <router-link to="/dedicatedgame">
+    <button class="btn btn-primary">Zum Spiel</button>
+  </router-link>
+</template>
+
+<style scoped lang="scss">
+
+</style>