WIP: Build on arm64 too

[kernle32dll]

Well, it would be cool to have an arm64 docker image. That could e.g. allow loginsrv to run on an raspberry pi.

This is an WIP PR to get the travis build running.

[coveralls]

Coverage remained the same at 91.734% when pulling ce27ca5 on kernle32dll:build-arm into be2ae2c on tarent:master.

[kernle32dll]

Hi, @J-Rocke @smancke @gereons

I wanted to kick off discussion if it would be worthwhile to provide an ARM64 Docker image of loginsrv.

At home, we have devices like the Raspberry Pi et all.. In the enterprise segment, we not only start to see cheap ARM based bare-metal servers, but also more and more cloud offerings, e.g. in AWS.

This PR proves that loginsrv builds flawlessly with ARM64. Next step would be to adjust the push pipeline, to build a multi-plattform image.

[g-w]

Hello @kernle32dll,
currently it is out of our scope to support arm64. Beside compiling the binaries for arm64, we have to maintain the software for the architecture and be able to fix bugs. Currently nobody in our team regularly uses golang on arm64 and hence we are not able to support the development.

Feel free to build your own arm64 images and publish them. But we won't.

Kind regards, Gregor