Make app use full space

frontend/src/assets/main.css

@@ -1,4 +1,11 @@
 body {
    background-color: rgb(53, 25, 60);
    margin:0;
+   width: 100vw;
+   height: 100vh;
+}
+
+#app {
+   width: 100%;
+   height: 100%;
 }