Improve description

Author: EvalVis

README.md

@@ -2,7 +2,17 @@
 
 [![codecov](https://codecov.io/gh/AzulImplementation/AzulApiJava/branch/main/graph/badge.svg)](https://codecov.io/gh/AzulImplementation/AzulApiJava)
 
-# Building and running the API
+## Using the API
+
+Download the jar file from [https://github.com/AzulImplementation/AzulApiJava/releases](releases).
+
+Execute: `java -jar target/azulapi.jar <number of players (from 2 to 4)>`.
+
+# Running the API with Maven
+
+If you have Maven installed you can use: `mvn spring-boot:run "-Dspring-boot.run.arguments=<number of players (from 2 to 4)>"`
+
+or:
 
 ```
 mvn clean package