Fix cannot update (#5890)

src/server/web/index.ts

@@ -327,6 +327,10 @@ const override = (source: string, target: string, depth: number = 0) =>
 router.get('/othello', async ctx => ctx.redirect(override(ctx.URL.pathname, 'games/reversi', 1)));
 router.get('/reversi', async ctx => ctx.redirect(override(ctx.URL.pathname, 'games')));
 
+router.get('/flash', async ctx => {
+	await ctx.render('flash');
+});
+
 // Render base html for all requests
 router.get('*', async ctx => {
 	const meta = await fetchMeta();