Update README

Author: jetsaii

README.md

@@ -52,14 +52,18 @@ First clone the repository onto your local machine.
 
 Maven must be installed to run the following commands.
 
+#### `mvn clean`
+
+Removes all files generated by the previous build.
+
 #### `mvn package`
 
 Builds the project (while also running all of the tests).
 
 #### `mvn spring-boot:run`
 
-Serves the Tomcat servlet container on http://localhost:8080.
+Serves the Apache Tomcat servlet container on http://localhost:8080.
 
-#### `mvn -Dtest=leetcode.api.*Tests test`
+#### `mvn test`
 
 Runs all the tests.