Dockerfiles have some architecture hardcoding for x86

[ericvh]

Ran into this while trying to build the e2e_tests/docker_image on an M1

 => ERROR [34/54] RUN cd nanopb-0.4.4-linux-x86  && cmake .  && make  && make install                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                0.2s
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 > [34/54] RUN cd nanopb-0.4.4-linux-x86        && cmake .      && make         && make install:
#37 0.188 qemu-x86_64: Could not open '/lib64/ld-linux-x86-64.so.2': No such file or directory

[mohamedasaker-arm]

Thanks @ericvh for creating the issue. Could you give more details about what you were trying to achieve?
The docker image is intended to run e2e_tests, so targeting a specific architecture (The CI one) was okay.
Do you think we could benefit from generalizing the docker image or have different ones for different architectures?

[ericvh]

I think we should be arm64 by default and multiarch (at least linux/arm64 and ideally linux/arm/v7 in addition to amd64) - its easy enough to do nowdays, I can show you my multi-arch github CI if you like which generates signed buildx docker multiarch manfiests