Multi-arch support

[ckulka]

Added multi-arch support, e.g. to address #25.

If there's anything missing or should be done differently, just let me know.

[tzapu]

any chance of getting this merged?

[fablernas]

Any news about this being merged?

[artempronevskiy]

This PR is in pending state till it's fully tested. No exact ETA, unfortunately.

[ghost]

Any news about this?

[webash]

I'm fairly new to Docker. What's the easiest way to be able to consume this multi-arch image on a Raspberry Pi in lieu of Resilio accepting this?

Edit: Ah, I used my eyes and realised its on Docker Hub.

[willkara]

Any updates on multi-arch support on the official docker image?

[ikill69]

Any chance of getting this updated and merged please.