che #14947: Releasing 7.3.1 version of the che-machine-exec. Adding rhel.Dockerfile

Signed-off-by: Ilya Buziuk <ibuziuk@redhat.com>

Author: ibuziuk

VERSION

@@ -1 +1 @@
-7.3.0
+7.3.1

rhel.Dockerfile

@@ -0,0 +1,28 @@
+# Copyright (c) 2019 Red Hat, Inc.
+# This program and the accompanying materials are made
+# available under the terms of the Eclipse Public License 2.0
+# which is available at https://www.eclipse.org/legal/epl-2.0/
+#
+# SPDX-License-Identifier: EPL-2.0
+#
+# Contributors:
+#   Red Hat, Inc. - initial API and implementation
+#
+
+# https://access.redhat.com/containers/?tab=tags#/registry.access.redhat.com/rhel8/go-toolset
+FROM rhel8/go-toolset:1.11.13-18 as builder
+ENV PATH=/opt/rh/go-toolset-1.11/root/usr/bin:$PATH \
+    GOPATH=/go/
+USER root
+WORKDIR /go/src/github.com/eclipse/che-machine-exec/
+COPY . .
+RUN adduser unprivilegeduser && \
+    CGO_ENABLED=0 GOOS=linux go build -a -ldflags '-w -s' -a -installsuffix cgo -o che-machine-exec .
+
+FROM scratch
+COPY --from=builder /etc/passwd /etc/passwd
+COPY --from=builder /go/src/github.com/eclipse/che-machine-exec/che-machine-exec /go/bin/che-machine-exec
+USER unprivilegeduser
+ENTRYPOINT ["/go/bin/che-machine-exec"]
+
+# append Brew metadata here