feat: add Maven JAR plugin to ensure JAR creation with main class configuration

Author: AbaSheger

user-tracking-service/pom.xml

@@ -37,14 +37,14 @@
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
         </dependency>
-        
+
         <!-- H2 Database -->
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
             <scope>runtime</scope>
         </dependency>
-        
+
         <!-- Test Dependencies -->
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -67,10 +67,25 @@
 
     <build>
         <plugins>
+            <!-- Spring Boot Plugin -->
             <plugin>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-maven-plugin</artifactId>
             </plugin>
+
+            <!-- Maven JAR Plugin to ensure the JAR is created -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.2.0</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <mainClass>com.example.usertracking.UserTrackingServiceApplication</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
         </plugins>
     </build>
 </project>