Multi platform compatible docker image builds.

[agpenton]

I noticed that the build of the docker image in the repository is just linux/amd64, and in my case that image is not useful, cause my system is on ARM architecture. So I got 2 errors:

1. since the image is on amd64, I can't run that image.
2. I've tried to build the image from the Dockerfile, and I got an error when apt try to install libjpeg-turbo-official.
   • This is part of the output of the error:

          #15 4.361 dpkg: error processing archive ./libjpeg-turbo-official_1.5.3_amd64.deb (--install):
          #15 4.361  package architecture (amd64) does not match system (arm64)
          #15 4.651 Errors were encountered while processing: 
          #15 4.652  ./libjpeg-turbo-official_1.5.3_amd64.deb
          ------
          error: failed to solve: rpc error: code = Unknown desc = executor failed running [/bin/sh -c wget 
          https://downloads.sourceforge.net/project/libjpeg-turbo/1.5.3/libjpeg-turbo-official_1.5.3_amd64.deb && dpkg -i ./libjpeg*.deb && apt-get -f install]: exit code: 1
     

[randomorder]

what's the status of this one @agpenton ?
I see two closed PRs in the repo

[randomorder]

@agpenton ?