Add Raspberry Pi 3 Dockerfile

[JAremko]

I think it will be useful to have images for Raspberry Pi since those things usually lay around unused and can be easily powered 24/7.

I pushed the image here https://hub.docker.com/r/jare/tgdante2-rpi3/tags/ You can test it curl -x socks5://peka:[email protected]:1080 https://web.telegram.org