Add UBI Dockerfiles for Konveyor

Dockerfile-velero-restic-restore-helper.ubi

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+FROM openshift/origin-release:golang-1.14 AS builder
+COPY . /go/src/github.com/vmware-tanzu/velero
+RUN cd /go/src/github.com/vmware-tanzu/velero \
+&& CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-extldflags "-static"' -mod=mod ./cmd/velero-restic-restore-helper
+
+FROM registry.access.redhat.com/ubi8-minimal
+RUN microdnf -y update && microdnf clean all
+
+COPY --from=builder /go/src/github.com/vmware-tanzu/velero/velero-restic-restore-helper /velero-restic-restore-helper
+
+USER nobody:nobody
+
+ENTRYPOINT [ "/velero-restic-restore-helper" ]

Dockerfile.ubi

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+FROM openshift/origin-release:golang-1.14 AS builder
+COPY . /go/src/github.com/vmware-tanzu/velero
+RUN cd /go/src/github.com/vmware-tanzu/velero \
+&& CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-extldflags "-static" -X github.com/vmware-tanzu/velero/pkg/buildinfo.Version=v1.3.0-konveyor' -mod=mod ./cmd/velero
+
+RUN mkdir /go/src/github.com/restic \
+&& cd /go/src/github.com/restic \
+&& git clone https://github.com/konveyor/restic -b konveyor-dev \
+&& cd /go/src/github.com/restic/restic \
+&& CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-extldflags "-static"' ./cmd/restic
+
+FROM registry.access.redhat.com/ubi8-minimal
+RUN microdnf -y install nmap-ncat && microdnf clean all
+RUN microdnf -y update && microdnf clean all
+
+COPY --from=builder /go/src/github.com/vmware-tanzu/velero/velero velero
+COPY --from=builder /go/src/github.com/restic/restic/restic /usr/bin/restic
+
+USER nobody:nobody
+
+ENTRYPOINT ["/velero"]