Peter Dave Hello 04af2a25d2 Remove apt-get clean in Dockerfile.{jetty,tomcat} ...

Also manually cleaned up `/var/lib/apt/lists` in original commits but
got conflict with #97, then removed.

Ref:
https://docs.docker.com/develop/develop-images/dockerfile_best-practices/

> In addition, when you clean up the apt cache by removing
> /var/lib/apt/lists it reduces the image size, since the apt cache is not
> stored in a layer.

> Official Debian and Ubuntu images automatically run apt-get clean,
> so explicit invocation is not required.

2021-04-23 22:25:45 +02:00

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