many update

server/util.js

@@ -1,3 +1,12 @@
-exports.sleep = (ms) => {
+/*
+ * Common functions - can be used in frontend or backend
+ */
+
+export function sleep(ms) {
     return new Promise(resolve => setTimeout(resolve, ms));
 }
+
+export function ucfirst(str) {
+    const firstLetter = str.substr(0, 1);
+    return firstLetter.toUpperCase() + str.substr(1);
+}