Update build steps to include manifest

pom.xml

@@ -19,6 +19,25 @@
 		<java.version>11</java.version>
 	</properties>
 
+	<build>
+		<plugins>
+			<plugin>
+				<!-- Build an executable JAR -->
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-jar-plugin</artifactId>
+				<version>3.2.0</version>
+				<configuration>
+					<archive>
+						<manifest>
+							<addClasspath>true</addClasspath>
+							<classpathPrefix>lib/</classpathPrefix>
+							<mainClass>netneutrality.MusicBot</mainClass>
+						</manifest>
+					</archive>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
 
 	<repositories>
 		<repository> <!-- This repo fixes issues with transitive dependencies -->