Add code snippet for ICS-generation.

.gitignore

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+/node_modules/

.vscode/extensions.json

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+{
+    "recommendations": [
+        "esbenp.prettier-vscode",
+        "streetsidesoftware.code-spell-checker"
+    ]
+}

README.md

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+# Just an example of how to share events using links
+
+## How to run the project
+
+```bash
+npm ci
+npm start
+
+```
+
+## Custom solution example
+
+### Generate ICS-text from URL quiery parameters
+
+http://localhost:8080/generate-event?description=Annual+concert+at+the+Moscow+House+of+Music
+
+### Generate ICS-file from URL quiery parameters
+http://localhost:8080/generate-event?description=Annual+concert+at+the+Moscow+House+of+Music&output=file
+
+
+## Third-party examples
+* https://jekuer.github.io/add-to-calendar-button/ - A convenient JavaScript snippet, which lets you create beautiful buttons, where people can add events to their calendars.
+* https://jennamolby.com/ics-link-generator/ - Outlook Calendar (.ICS) Link Generator
+

eventTemplate.js

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+// Event example, using a template.
+exports.eventTemplate = {
+  start: [2022, 05, 19, 19, 00],
+  duration: { hours: 6, minutes: 30 },
+  title: "Орган от барокко до рока",
+  description:
+    "Орган - «король инструментов», которому подвластны все музыкальные стили. В программе хиты групп Queen, Beatles, Deep Purple гармонично соседствуют м такими органными шедеврами, как Токката и фуга реминор Баха, «Готическая сюита» Л. Боэльмана и соло на тему знаменитого 24-го каприса Н. Паганини.",
+  location: "Космодамианская наб., 52, стр. 8, Москва, Россия",
+  url: "https://www.mmdm.ru/",
+  geo: { lat: 37.622504, lon: 55.753215 },
+  // categories: ["10k races", "Memorial Day Weekend", "Boulder CO"],
+  status: "CONFIRMED",
+  busyStatus: "BUSY",
+  organizer: { name: "Светлановский зал", email: "help@mmdm.ru" },
+//   attendees: [
+//     {
+//       name: "Adam Gibbons",
+//       email: "adam@example.com",
+//       rsvp: true,
+//       partstat: "ACCEPTED",
+//       role: "REQ-PARTICIPANT",
+//     },
+//     {
+//       name: "Brittany Seaton",
+//       email: "brittany@example2.org",
+//       dir: "https://linkedin.com/in/brittanyseaton",
+//       role: "OPT-PARTICIPANT",
+//     },
+//   ],
+};

index.js

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+const express = require("express");
+const fs = require("fs");
+const ics = require("ics");
+const marked = require("marked");
+
+// Define defaults of HTTP port/host, can be redefined by environment variables.
+const HTTP_PORT = process.env.HTTP_PORT || 8080;
+const HTTP_HOST = process.env.HTTP_HOST || "localhost";
+const README_FILE = "README.md";
+
+// Init the Express application instance.
+const app = express();
+
+// Just show `README.md` file as a main page.
+app.get("/", (req, res) => {
+  fs.readFile(README_FILE, { encoding: "utf8" }, (error, file) => {
+    if (error) {
+      console.error(error);
+      process.exit(1);
+      return;
+    }
+    const html = marked.marked(file);
+    res.send(html);
+  });
+});
+
+// Generate ICS-file example tuned with URL query parameters.
+app.get("/generate-event", function (req, res) {
+  // Load event template from the file.
+  const eventTemplate = require("./eventTemplate");
+  let event = JSON.parse(JSON.stringify(eventTemplate.eventTemplate));
+  event.description = req.query.description;
+  ics.createEvent(event, (error, iCalEventText) => {
+    if (error) {
+      console.error(error);
+      return;
+    }
+
+    // Response as a file if required.
+    if (req.query.output === "file") {
+      res.set({
+        "Content-Type": "text/calendar",
+        "Content-Disposition": "inline;filename=calendar.ics",
+      });
+    } else {
+      res.set({
+        "Content-Type": "text/plain",
+      });
+    }
+    res.send(iCalEventText);
+  });
+});
+
+// Starting a HTTP server.
+console.log(`Server is running on http://${HTTP_HOST}:${HTTP_PORT}...`);
+app.listen(HTTP_PORT);

package.json

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+{
+  "name": "ical-example",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "node index.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "ssh://gitea@git.dev.hsdesign.ru:1224/public/ical-example.git"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.18.1",
+    "http": "^0.0.1-security",
+    "ical-generator": "^3.4.2",
+    "ics": "^2.35.0",
+    "marked": "^4.0.15"
+  }
+}