docker cross compilation, packaging and testing

[lanmarc77]

[Gustl22]

Sorry first I haven't had time for a review and also somehow forgot it :sweat_smile: I saw the maintainers now provide a build script: https://github.com/haiwen/seafile-docker/tree/master/build

I will give feedback if they plan to also build for arm.

[lanmarc77]

The script from the devs seems to go the direction we have went. It does not implement different architectures and platforms though. It assumes Ubuntu and their package naming. But most likely could be run in any architecture environment where Ubuntu is supported. It would be great if they add multi architecture support and automated pipeline building. Everyone could just fork the repo and click build. I am on the other hand are in process of moving to a different file syncing solution and will not invest any time in Seafile anymore. Please use all the code especially for the auto build in pipeline and the following tests to automate as much as possible to work for different architectures. RISC V being the next already showing on the horizon.