Lisa7.5.1 Docker implementation

Hi,

We are trying to do a docker implementation of Lisa 7.5.1.

CA Support has come back saying docker support for Lisa is available only from Devtest 9 onwards.

Just wondering if there is any reason why the Devtest 9 docker images can't be reused for Lisa 7.5.1? Has anyone done this before?

Thanks,

Amruta Kale