[#22] docs: user instruction added in the readme

README.md

@@ -1,10 +1,36 @@
 # LeetEasy
+![](docs/leeteasy-demo.png)
+<br/>
+<br/>
 Desktop notification for easy daily challenges in [leetcode](https://leetcode.com/).
 
-We all know Leetcode's daily challenges are awesome :sunglasses: However, sometimes these challenges are quite difficult for people who are just starting out problem-solving 	:smiling_face_with_tear:  
-This tool will send desktop notification when an **Easy** daily problem is published. This way you won't miss any opportunity to grab some easy **Leetcoins** :coin:
+We all know `Leetcode's` daily challenges are awesome :sunglasses: However, sometimes these challenges are quite difficult for people who are just starting out problem-solving 	:smiling_face_with_tear:  
+This tool will send desktop notification when an **Easy** daily problem is published. This way you won't miss any opportunity to grab some easy **Leetcoins** :coin: and stay motivated for the day :fire:
 
-# Contribution guideline
+## Installation
+```shell
+pip install leeteasy
+```
+## run
+Schedule leeteasy to send notification for easy leetcode problem at 14:30 (24 hours format time)
+```shell
+python -m leeteasy start 14:30
+```
+To add additional difficulty
+
+```shell
+python -m leeteasy start 14:30 --difficulty medium
+```
+This will schedule leeteasy for **Easy and Medium** problem.
+To stop leeteasy
+```shell
+python -m leeteasy stop
+```
+> **_NOTE:_**  By default `leeteasy` checks for scheduled task in every 10 minutes/600 seconds.
+> So there might be 10 minutes delay from the actual scheduled time while getting the notification. However,
+> this can be controlled using `--sleep_duration` option.
+
+## Contribution guideline
 
 If you like this project and want to improve by adding features, fixing bugs or anything, please follow
 the [contributing guidelines](docs/CONTRIBUTING.md).