Added maintenance mode.

src/web/server.js

@@ -162,7 +162,19 @@ async function initServer() {
 	});
 
 	router.use(errorHandler);
-	app.use(router);
+
+	if (config.web.maintenance.enabled) {
+		app.use(express.static('public'));
+
+		app.get('/', (req, res) => {
+			res.status(503).render(path.join(__dirname, '../../assets/maintenance.ejs'), {
+				analytics: config.analytics,
+				text: config.web.maintenance.text,
+			});
+		});
+	} else {
+		app.use(router);
+	}
 
 	const server = app.listen(config.web.port, config.web.host, () => {
 		const { address, port } = server.address();