initial hardening

Dockerfile

+ARG BASE_REGISTRY=registry1.dso.mil
+ARG BASE_IMAGE=ironbank/redhat/ubi/ubi8-minimal
+ARG BASE_TAG=8.4
+
+FROM ${BASE_REGISTRY}/${BASE_IMAGE}:${BASE_TAG}
+
+ARG DEFAULTUID=1001
+ARG DEFAULTGID=1001
+
+COPY rda-converter.zip /tmp
+RUN microdnf install -y unzip shadow-utils && \
+    groupadd -g ${DEFAULTGID} -r default && \
+    useradd -u ${DEFAULTUID} -r -g default default && \
+    unzip /tmp/rda-converter.zip -d /usr/local/bin && \
+    microdnf remove -y unzip shadow-utils && \
+    microdnf clean all && \
+    rm -rf /var/cache/yum /var/tmp/* /tmp/* /var/tmp/.???* /tmp/.???*
+
+USER ${DEFAULTUID}
+
+ENTRYPOINT ["/usr/local/bin/rda-converter"]
\ No newline at end of file