images: add linux arm/v7/v8 support

[cpanato]

• images: add linux arm/v7/v8 support

Fixes: #1104

cc @mumoshu

[cpanato]

looks like this dependency does not have the arm available https://github.com/Yelp/dumb-init

[cpanato]

i will try to build locally, found other places that I was not aware when open this pr

[cpanato]

@mumoshu if the dumb-init is required, I think we will need to close this pr because that does not have the arm support and the underlining dependencies for that also does not have (for context pypa/manylinux#84) so will take some time :/

[mumoshu]

@cpanato Ah, good catch! I believe we don't have a strict requirement to stick with dumb-init. I thought there was a similar open source project that is written in Golang. IMHO a Golang-written alternative would have a better story on cross-platform.

[mumoshu]

@toast-gear has suggested using tini instead, and I think it's great!
The only gotcha would be that we need to pass -g to tini to make it compatible with our usage(and the default behavior of dumb-init)

https://github.com/Yelp/dumb-init#session-behavior
https://github.com/krallin/tini#process-group-killing

[cpanato]

sounds good! this is something you want to change and you want this in the project?

i will close this pr for now, thanks for all the support! 🎉