bashbrew-arch  variants
amd64          alpine3.10,alpine3.11,alpine3.12,alpine3.9,buster,buster-slim,stretch,stretch-slim
arm32v6        alpine3.10,alpine3.11,alpine3.12,alpine3.9
arm32v7        alpine3.10,alpine3.11,alpine3.12,alpine3.9,buster,buster-slim,stretch,stretch-slim
arm64v8        alpine3.10,alpine3.11,alpine3.12,alpine3.9,buster,buster-slim,stretch,stretch-slim
i386           alpine3.10,alpine3.11,alpine3.12,alpine3.9
ppc64le        alpine3.10,alpine3.11,alpine3.12,alpine3.9,buster,buster-slim
s390x          alpine3.10,alpine3.11,alpine3.12,alpine3.9,buster,buster-slim