Update 'README.md'

README.md

 ## Exploring the Application
 
 After the application runs, it will be available at: 
-[](http://localhost:8080/cargo-tracker/). Under the hood, the application uses a 
+[http://localhost:8080/cargo-tracker/](http://localhost:8080/cargo-tracker/). Under the hood, the application uses a 
 number of Java EE (and Java EE 7) features including JSF 2.2, CDI, EJB 3.2, 
 JPA 2.1, JAX-RS 2, WebSocket, JSON-P, Bean Validation 1.1 and JMS 2.