Building Bionic image with fenix on Focal host

Hi,

i’m trying to build a Ubunt Bionic based image for a Edge board but my host is Ubuntu Focal. I thought that the Fenix Docker would allow this, but it does not. I’m now trying to build a Docker image based on ubuntu:bionic to run fenix in a Bionic container. First part of the build goes well but the build stops at

Failure trying to run: mount -t proc proc /proc

any idea on how to get this to work ?

Thanks

Got everything to work by using the same run command as the fenix Docker and adding the apt-cacher-ng package in the ubuntu base docker image

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