Add instructions on building and running

Author: EvalVis

README.md

@@ -1,3 +1,10 @@
 # AzulApiJava
 
-[![codecov](https://codecov.io/gh/AzulImplementation/AzulApiJava/branch/main/graph/badge.svg)](https://codecov.io/gh/AzulImplementation/AzulApiJava)
+[![codecov](https://codecov.io/gh/AzulImplementation/AzulApiJava/branch/main/graph/badge.svg)](https://codecov.io/gh/AzulImplementation/AzulApiJava)
+
+# Building and running the API
+
+```
+mvn clean package
+java -jar target/azulapi.jar <number of players (from 2 to 4)>
+```

pom.xml

@@ -34,6 +34,7 @@
     </dependencies>
 
     <build>
+        <finalName>azulapi</finalName>
         <plugins>
             <plugin>
                 <groupId>org.springframework.boot</groupId>