no main manifest attribute, in /

Docker构建SpringBoot项目—>创建并运行容器，提示“no main manifest attribute, in / ”错误，如何解决：

修改文件：注释掉或删掉skip标签，添加includeSystemScope标签，如下所示：

<plugin>
    <groupId></groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <version>${}</version>
    <configuration>
        <mainClass></mainClass>
        <!-- <skip>true</skip> -->
        <!-- 将上面skip标签注释掉或删掉，添加如下includeSystemScope标签 -->
        <includeSystemScope>true</includeSystemScope>
    </configuration>
    <executions>
        <execution>
            <id>repackage</id>
            <goals>
                <goal>repackage</goal>
            </goals>
        </execution>
    </executions>
</plugin>