Install skopeo in container images

The container roles in zuul jobs use skopeo to copy to and from
the intermediate registry. It is therefore helpful to have
skopeo in the images.

Change-Id: I1550b2eeca6cb1755976dd884e668bddf960f296

Dockerfile

@@ -55,6 +55,15 @@ COPY --from=builder /usr/local/lib/zuul/ /usr/local/lib/zuul
 COPY --from=builder /tmp/openshift-install/kubectl /usr/local/bin/kubectl
 COPY --from=builder /tmp/openshift-install/oc /usr/local/bin/oc
 
+# https://podman.io/getting-started/installation.html
+COPY tools/2472D6D0.asc /etc/apt/trusted.gpg.d/kubic.asc
+RUN echo 'deb https://download.opensuse.org/repositories/devel:/kubic:/libcontainers:/stable/Debian_10/ /' > /etc/apt/sources.list.d/devel:kubic:libcontainers:stable.list \
+  && apt-get update \
+  && apt-get install -y \
+      skopeo \
+  && apt-get clean \
+  && rm -rf /var/lib/apt/lists/*
+
 CMD ["/usr/local/bin/zuul-executor", "-f"]
 
 FROM zuul as zuul-fingergw

tools/2472D6D0.asc

@@ -0,0 +1,21 @@
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