align go lang version in the Dockerfile.develop.ci

Signed-off-by: Spolti <[email protected]>

Dockerfile.develop.ci

@@ -15,7 +15,52 @@
 ###############################################################################
 # Create the develop, test, and build environment
 ###############################################################################
-FROM registry.access.redhat.com/ubi8/go-toolset:1.19
+
+# TODO: replace the "go_toolset" build stage once ubi8/go-toolset:1.21 is available
+# the go-toolset 1.21 is based on ubi9, we need to update it in the base image as well.
+FROM registry.access.redhat.com/ubi8/ubi-minimal:latest as go-toolset
+
+# https://docs.docker.com/engine/reference/builder/#automatic-platform-args-in-the-global-scope
+# We need TARGETOS and TARGETARCH (not BUILDOS and BUILDARCH) since the developer
+# image should be built for the OS of the developer using it (this is not a "builder image")
+ARG TARGETOS
+ARG TARGETARCH
+
+ARG GOLANG_VERSION=1.21.6
+
+USER root
+
+ENV HOME=/root \
+    PATH=/usr/local/go/bin:$PATH:
+
+WORKDIR /workspace
+
+# install necessary tools that are included in the ubi/go-toolset image that we are temporarily replacing
+RUN --mount=type=cache,target=/root/.cache/microdnf:rw \
+    microdnf --setopt=cachedir=/root/.cache/microdnf --nodocs install \
+       diffutils \
+       gcc-c++ \
+       make \
+       wget \
+       tar \
+       git \
+       which \
+    && microdnf update --nodocs \
+    && true
+
+# install go
+RUN true \
+    && wget -qO go.tgz "https://golang.org/dl/go${GOLANG_VERSION}.${TARGETOS:-linux}-${TARGETARCH:-amd64}.tar.gz" \
+    && tar -C /usr/local -xzf go.tgz \
+    && go version \
+    && rm go.tgz \
+    && true
+
+####################################################################################
+# TODO: replace "go-toolset" build stage with ubi/go-toolset:1.21 once available   #
+#       and swap `microdnf` commands for `dnf`                                     #
+####################################################################################
+FROM go-toolset
 
 # https://docs.docker.com/engine/reference/builder/#automatic-platform-args-in-the-global-scope
 # don't provide "default" values (e.g. 'ARG TARGETARCH=amd64') for non-buildx environments,