Added maven-jar-plugin for building executable jar files

pom.xml

@@ -49,6 +49,20 @@
                     <!-- JUnit 5 requires Surefire version 2.22.0 or higher -->
                     <version>2.22.2</version>
                 </plugin>
+                <plugin>
+                    <!-- Building an executable jar -->
+                    <groupId>org.apache.maven.plugins</groupId>
+                    <artifactId>maven-jar-plugin</artifactId>
+                    <version>3.1.0</version>
+                    <configuration>
+                        <archive>
+                            <manifest>
+                                <!-- give full qualified name of your main class-->
+                                <mainClass>Main</mainClass>
+                            </manifest>
+                        </archive>
+                    </configuration>
+                </plugin>
             </plugins>
         </pluginManagement>
     </build>