AEM Project Build issue for ui-frontend module "exec-maven-plugin" for internal repository

[varaande]

Hi Team

Currently we working on Government project where w are not allowed to use public repositories (only private & internal repository ).

when we build AEM Project locally not able to build the ui-frontend module (other module able build)

Question , Kindly help about "exec-maven-plugin" what is this plugin all about  & usage and how to download this to add into private & internal repository 

Here is my root pom.xml entry of "exec-maven-plugin"

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>exec-maven-plugin</artifactId>
    <version>1.6.0</version>
    <executions>
        <execution>
        <id>docker-build</id>
        <phase>package</phase>
        <goals>
            <goal>exec</goal>
        </goals>
        <configuration> 
            <executable>docker</executable>
            <workingDirectory>.</workingDirectory>
            <arguments>
                <argument>build</argument>
                <argument>-t</argument>
                <argument>${project.groupId}-${project.artifactId}/ui.tests:${project.version}</argument>
                <argument>.</argument>
            </arguments>
        </configuration>
        </execution>
        <execution>
        <id>docker-tag</id>
        <phase>package</phase>
        <goals>
            <goal>exec</goal>
        </goals>
        <configuration> 
            <executable>docker</executable>
            <workingDirectory>.</workingDirectory>
            <arguments>
                <argument>tag</argument>
                <argument>${project.groupId}-${project.artifactId}/ui.tests:${project.version}</argument>
                <argument>${project.groupId}-${project.artifactId}/ui.tests:latest</argument>
            </arguments>
        </configuration>
        </execution>
    </executions>
</plugin>

Regards

Vara