fix: upgrade skopeo to fix vulnerabilities

Author: ivanstanev

Dockerfile

@@ -5,7 +5,7 @@ FROM fedora:32 AS skopeo-build
 
 RUN dnf install -y golang git make
 RUN dnf install -y go-md2man gpgme-devel libassuan-devel btrfs-progs-devel device-mapper-devel
-RUN git clone --depth 1 -b 'v1.2.2' https://github.com/containers/skopeo $GOPATH/src/github.com/containers/skopeo
+RUN git clone --depth 1 -b 'v1.4.0' https://github.com/containers/skopeo $GOPATH/src/github.com/containers/skopeo
 RUN cd $GOPATH/src/github.com/containers/skopeo \
   && make bin/skopeo DISABLE_CGO=1 \
   && make install
@@ -42,7 +42,7 @@ RUN rm /install.sh
 
 WORKDIR /srv/app
 
-COPY --chown=snyk:snyk --from=skopeo-build /usr/bin/skopeo /usr/bin/skopeo
+COPY --chown=snyk:snyk --from=skopeo-build /usr/local/bin/skopeo /usr/bin/skopeo
 COPY --chown=snyk:snyk --from=skopeo-build /etc/containers/registries.d/default.yaml /etc/containers/registries.d/default.yaml
 COPY --chown=snyk:snyk --from=skopeo-build /etc/containers/policy.json /etc/containers/policy.json