The container FROM substitution only works on a single (the first) FROM statement in a Containerfile.
Would be good to figure out how multiple subs can be made or support for an alternative Containerfile entirely can be added.
E.g. Many go operators using the operator-sdk have Containerfiles that look like this:
FROM quay.io/cuppett/golang:1.17 as builder
(steps to build go binary)
FROM registry.access.redhat.com/ubi8/ubi-minimal
COPY --from=builder
The container FROM substitution only works on a single (the first) FROM statement in a Containerfile.
Would be good to figure out how multiple subs can be made or support for an alternative Containerfile entirely can be added.
E.g. Many go operators using the operator-sdk have Containerfiles that look like this:
FROM quay.io/cuppett/golang:1.17 as builder
(steps to build go binary)
FROM registry.access.redhat.com/ubi8/ubi-minimal
COPY --from=builder