add project description to README.md

Author: ExpCoderWeb

README.md

@@ -1,4 +1,36 @@
 ### Hexlet tests and linter status:
 [![Actions Status](https://github.com/ExpCoderWeb/fullstack-javascript-project-11/actions/workflows/hexlet-check.yml/badge.svg)](https://github.com/ExpCoderWeb/fullstack-javascript-project-11/actions) [![lint](https://github.com/ExpCoderWeb/fullstack-javascript-project-11/actions/workflows/lint.yml/badge.svg)](https://github.com/ExpCoderWeb/fullstack-javascript-project-11/actions/workflows/lint.yml)
 
-[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=ExpCoderWeb_fullstack-javascript-project-11&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=ExpCoderWeb_fullstack-javascript-project-11)
+[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=ExpCoderWeb_fullstack-javascript-project-11&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=ExpCoderWeb_fullstack-javascript-project-11)
+
+### Brief introduction
+There is a special format representing web news feeds, article annotations, and other content called **RSS**. This is the easiest way for websites (usually blogs) to enable users to subscribe to updates. For this purpose, special services called RSS aggregators are used. These services can check RSS web feeds for updates and conveniently display them, marking what they have read, and so on.
+
+### Project overview
+**RSS Reader** is a RSS feeds aggregator that provides the ability to add an infinite number of RSS feeds. The content of each feed is automatically updated every 5 seconds and new posts are included to the main stream.
+
+### Requirements:
+- Unix terminal
+- Node.js: 18.x or higher
+
+### Setup
+```bash
+git clone git@github.com:ExpCoderWeb/fullstack-javascript-project-11.git
+```
+
+```bash
+cd fullstack-javascript-project-11
+```
+
+```bash
+make install
+```
+Then, there are 2 options:
+
+`make develop` - _for local launch_
+
+`make build` - _for application build_
+
+### Usage
+You can try the service on the following link:
+[RSS Reader](https://rss-reader-kxbrjeqp0-expcoderwebs-projects-534e6897.vercel.app/)