Docs: Add usage info

PrashanthaTP · PrashanthaTP · commit 4cc9917818bc · 2022-10-25T01:34:03.000+05:30
diff --git a/README.md b/README.md
@@ -3,3 +3,19 @@
 >
 > Node JS client to consume Leetcode Proxy API
 >
+
+## Usage
+
+```
+Leetcode Api Client (v1.0.0)
+Command Line arguments:
+-h / --help                         : Print Help
+-d / --get-daily-challenge-question : Print Leetcode Daily Challenge Question Content To Stdout
+-o / --output                       : File to which stdout will be written
+```
+
+To get daily challenge question description in markdown format
+
+```bash
+npm run start -- -d --output daily_challenge.md
+```
