Add invalid symbol page

src/routes/uonetplus.js

@@ -2,6 +2,12 @@ const express = require('express');
 const router = express.Router();
 const protocol = require('../utils/connection');
 
+router.all("/:symbol", (req, res) => {
+    res.render('no-symbol', {
+        title: "Dziennik UONET+"
+    });
+});
+
 router.get("/powiatwulkanowy/Start.mvc/Endpoints", (req, res) => {
     const base = protocol(req) + "://" + req.get('host') + "/powiatwulkanowy/Start.mvc";
     res.json({

src/views/no-symbol.pug

@@ -0,0 +1,13 @@
+extends layout
+
+block extraHeader
+    meta(name="viewport" content="width=device-width, initial-scale=1")
+
+block content
+    #MainPage_ErrorDiv
+        div
+            h2 Informacja
+            | Podany identyfikator klienta jest niepoprawny.
+            br
+            br
+            p © 2020 Wulkanowy