The assembly configuration of ShardingSphere Proxy contains logback.xml which does not exist

[linghengqian]

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• When I was working on Fix nightly builds and release profile of ShardingSphere Proxy Native #23957 , I noticed that the assembly configuration of ShardingSphere Proxy contains logback.xml which does not exist. Refer to https://github.com/apache/shardingsphere/blob/19377e060f43daa63fb34ec4a169ab50ebce0093/distribution/proxy/src/main/assembly/shardingsphere-proxy-binary-distribution.xml .

<fileSet>
    <directory>../../proxy/bootstrap/src/main/resources</directory>
    <includes>
        <include>logback.xml</include>
    </includes>
    <outputDirectory>conf</outputDirectory>
    <fileMode>0644</fileMode>
</fileSet>

• I checked https://github.com/apache/shardingsphere/tree/19377e060f43daa63fb34ec4a169ab50ebce0093/proxy/bootstrap/src/main/resources and this file does not exist. Even if I compile locally, this file does not exist. So why pack a file that doesn't exist?
• 

[RaigorJiang]

Yes, logback.xml does not exist anymore, we should update the assembly file.

[linghengqian]

• I'm working on this issue.