use create react app to simplify the application

src/components/Flag/Flag.tsx

@@ -1,15 +1,22 @@
-import React from 'react';
-import './flag.scss';
-import {FlagType} from "../../model";
+import React from "react";
+import "./flag.scss";
+
+export type FlagType = "new" | "changed" | "default";
 
 interface ItemFlag {
   flag: FlagType;
 }
 
-export default function Flag({ item, short = false }: { item: ItemFlag; short?: boolean }) {
+export default function Flag({
+  item,
+  short = false,
+}: {
+  item: ItemFlag;
+  short?: boolean;
+}) {
   const ucFirst = (s: string) => s.charAt(0).toUpperCase() + s.slice(1);
 
-  if (item.flag !== 'default') {
+  if (item.flag !== "default") {
     let name = item.flag.toUpperCase();
     let title = ucFirst(item.flag);
     if (short === true) {