change readme

Author: Rajith

README.md

@@ -1,13 +1,37 @@
+# Build and Run
+```java
+mvn clean install -DskipTests spring-boot:run
+```
+# Usage
+### Checking app is deployed sucessfullly
+```sh
 curl -i http://localhost:9191/api/hello
 Hello User!
-
+```
+### Acess secure resource with token
+```sh
 curl -i http://localhost:9191/api/secure
+
 {"timestamp":1444985908768,"status":401,"error":"Unauthorized","message":"Access Denied","path":"/api/secure"}
+```
 
+### Fetching refresh_token
+```sh
 curl -vu rajithapp:secret 'http://localhost:9191/api/oauth/token?username=admin&password=admin&grant_type=password'
+
 {"access_token":"91202244-431f-444a-b053-7f50716f2012","token_type":"bearer","refresh_token":"e6f8624f-213d-4343-a971-980e83f734be","expires_in":1738,"scope":"read write"}
+```
 
+### Fetching acess_token by submitting refresh_token
+```sh
 curl -vu rajithapp:secret 'http://localhost:9191/api/oauth/token?grant_type=refresh_token&refresh_token=<refresh_token>'
+
 {"access_token":"821c99d4-2c9f-4990-b68d-18eacaff54b2","token_type":"bearer","refresh_token":"e6f8624f-213d-4343-a971-980e83f734be","expires_in":1799,"scope":"read write"}
+```
 
+### Access secure resource sucessfully
+```sh
 curl -i -H "Authorization: Bearer <access_token>" http://localhost:9191/api/secure
+
+Secure Hello!
+```