Include config files in shade plugin

We were working on some project where we have to include `config` folder as the `src/main/resources` in maven project.

Add below lines to pom.xml

<build>
    <resources>
        <resource>
            <directory>${project.basedir}/conf</directory>
        </resource>
    </resources>
    <testResources>
        <testResource>
            <directory>${project.basedir}/conf</directory>
        </testResource>
        <testResource>
            <directory>${project.basedir}/src/test/resources</directory>
        </testResource>
    </testResources>
</build>