[release-v0.25.1] Remove python http server from artifact image (knat…

…ive#835)

* [release-v0.25.1] Remove python http server from artifact image

* Fix duplicate package install

openshift/ci-operator/knative-images/client/Dockerfile.cliartifacts

@@ -1,16 +1,17 @@
-FROM registry.access.redhat.com/ubi8/ubi-minimal:latest
-# we'd need to create WORKDIR before hand to workaround image builder issue
-# on OCP 3.11 where it requires it present before referencing
-RUN mkdir -p /opt/app-root/src/go/src/github.com/knative/client
+FROM registry.ci.openshift.org/ocp/ubi-minimal:8 AS packager
 WORKDIR /opt/app-root/src/go/src/github.com/knative/client
-RUN microdnf install -y zip tar gzip python3
-ADD package_cliartifacts.sh LICENSE kn-*-* serve.py ./
-RUN bash package_cliartifacts.sh && \
-    mkdir -p /usr/share/kn/{linux_{amd64,arm64,ppc64le,s390x},macos,windows} && \
-    mv kn-linux-amd64.tar.gz /usr/share/kn/linux_amd64/ && \
-    mv kn-linux-arm64.tar.gz /usr/share/kn/linux_arm64/ && \
-    mv kn-linux-ppc64le.tar.gz /usr/share/kn/linux_ppc64le/ && \
-    mv kn-linux-s390x.tar.gz /usr/share/kn/linux_s390x/ && \
-    mv kn-macos-amd64.tar.gz /usr/share/kn/macos/ && \
-    mv kn-windows-amd64.zip /usr/share/kn/windows/
-CMD ["python3", "serve.py"]
+
+ADD package_cliartifacts.sh LICENSE kn-*-* ./
+RUN microdnf install -y zip tar gzip && \
+    bash package_cliartifacts.sh
+
+FROM registry.ci.openshift.org/ocp/ubi-minimal:8
+WORKDIR /opt/app-root/src/go/src/github.com/knative/client
+RUN mkdir -p /usr/share/kn/{linux_amd64,linux_arm64,linux_ppc64le,linux_s390x,macos,windows}
+
+COPY --from=packager /opt/app-root/src/go/src/github.com/knative/client/kn-linux-amd64.tar.gz /usr/share/kn/linux_amd64/
+COPY --from=packager /opt/app-root/src/go/src/github.com/knative/client/kn-linux-ppc64le.tar.gz /usr/share/kn/linux_ppc64le/
+COPY --from=packager /opt/app-root/src/go/src/github.com/knative/client/kn-linux-s390x.tar.gz /usr/share/kn/linux_s390x/
+COPY --from=packager /opt/app-root/src/go/src/github.com/knative/client/kn-macos-amd64.tar.gz /usr/share/kn/macos/
+COPY --from=packager /opt/app-root/src/go/src/github.com/knative/client/kn-windows-amd64.zip  /usr/share/kn/windows/
+COPY --from=packager /opt/app-root/src/go/src/github.com/knative/client/LICENSE  /usr/share/kn/LICENSE