Support for 11.1

[padyx]

First: Great that you have this repository and Dockerfile!

Do you plan to integrate / support 11.1, since 10.5 is not downloadable anymore?

(I tried to integrate it into the Dockerfile myself but always ran into cryptic issues during installation - I'm not a DB2 DBA... )

[TiloGit]

docker images are 2years old. Any plans to update?

[mustaphazorgati]

There have been fixes so that you can build your own 11.1 image now.

I've already done that for the taskana project: https://hub.docker.com/r/taskana/db2/

Feel free to use that one, if you don't want to create your own image.