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();

src/server/web/views/flash.pug

@@ -0,0 +1,20 @@
+doctype html
+
+html
+	script.
+		localStorage.removeItem('locale');
+
+		try {
+			navigator.serviceWorker.controller.postMessage('clear');
+
+			navigator.serviceWorker.getRegistrations().then(registrations => {
+				return Promise.all(registrations.map(registration => registration.unregister()));
+			}).then(() => {
+				location = '/';
+			});
+		} catch (e) {
+			console.error(e);
+			setTimeout(() => {
+				location = '/';
+			}, 10000)
+		}