Release docker image for ARM64

[odidev]

@xtremerui,
As per the discussion in concourse/docker-image-resource#324 (comment), I have built both golang-builder and registry-image-resource images with base-image as ubuntu:bionic and uploaded them to my repo in docker hub.

registry-image-resource: https://hub.docker.com/repository/docker/odidev/registry-image-resource
golang-builder: https://hub.docker.com/repository/docker/odidev/golang-builder

Verified the built binaries in the registry-image-resource as well. Please check below for the same:

root@a79adfa62367:/# file /opt/resource/check
/opt/resource/check: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, not stripped
root@a79adfa62367:/# file /opt/resource/in
/opt/resource/in: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, not stripped
root@a79adfa62367:/# file /opt/resource/out
/opt/resource/out: ELF 64-bit LSB executable, ARM aarch64, version 1 (SYSV), statically linked, not stripped

We have many images which are dependent and released through concourse-CI. It will be very helpful if the concourse adds arm64 support and releases official images for the arm64 platform. If required, I am happy to contribute.