fix: build plugin not in mpaste POM

mpaste/pom.xml

@@ -62,5 +62,25 @@
         </dependency>
     </dependencies>
 
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<version>3.2.2</version>
+				<executions>
+					<execution>
+						<goals>
+							<goal>repackage</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<mainClass>net.miarma.backend.mpaste.MpasteApplication</mainClass>
+					<layout>JAR</layout>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
 
 </project>