fix motd on mobile and format the player counts

src/common/number-utils.ts

@@ -0,0 +1,9 @@
+/**
+ * Formats a number using the browser's locale
+ *
+ * @param number the number to format
+ * @returns the formatted number
+ */
+export function formatNumber(number: number): string {
+  return new Intl.NumberFormat().format(number);
+}