add source to built jar

CityDoctorParent/pom.xml

@@ -51,6 +51,20 @@
 			</plugins>
 		</pluginManagement>
 		<plugins>
+			<!-- Source JAR generation -->
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-source-plugin</artifactId>
+				<version>3.3.0</version>
+				<executions>
+					<execution>
+						<id>attach-sources</id>
+						<goals>
+							<goal>jar-no-fork</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
 			<plugin>
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.13.0</version>