fix: update pom.xml

Author: carlosmmairena

.gitignore

@@ -2,6 +2,8 @@
 # Compiled class file
 *.class
 
+target/
+
 # Log file
 *.log
 

pom.xml

@@ -42,6 +42,14 @@
         <plugin>
           <artifactId>maven-jar-plugin</artifactId>
           <version>3.0.2</version>
+          <configuration>
+          <archive>
+            <manifest>
+              <addClasspath>true</addClasspath>
+              <mainClass>cr.go.municarrillo.proxyclient.App</mainClass>
+            </manifest>
+          </archive>
+        </configuration>
         </plugin>
       </plugins>
     </pluginManagement>