Feature/sifo580 Adding Podman to be used for registry access (#15)

* update for podman

* test readme

* Update README.md

Co-authored-by: Andy Roth <roth.andy@gmail.com>

* update for comeents from review

* update for syntax error on dnf -command

* update for Dockerfile

* update for comments from MR

* switched to podman 2.2

* update to move podman section in dockerfile

* put container-selinux back in

* cleanup and add podman_spec

* clearing extra space.

Co-authored-by: Sony Francis <sony.p.francis@saic.com>
Co-authored-by: Andy Roth <roth.andy@gmail.com>
Co-authored-by: Brad Staton <47569500+saic-statonb@users.noreply.github.com>

spec/podman_spec.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env shellspec
+
+Describe "printVersion()"
+  printVersion() {
+    podman --version | grep "${PODMAN_VERSION}"
+  }
+
+  It "validates tool is installed by checking version"
+    When call printVersion
+    The output should include "${PODMAN_VERSION}"
+    The status should eq 0
+  End
+End

src/docker/Dockerfile

@@ -27,7 +27,8 @@ ENV DOCKER_VERION=${DOCKER_VERSION}
 # base packages, so that we always get the latest version. These packages are very stable and
 # shouldn't ever need version pinning
 # Please keep the list alphabetized for maintainability
-RUN dnf install -y \
+
+RUN dnf install -y --refresh \
   bind-utils \
   bzip2 \
   bzip2-devel \
@@ -37,6 +38,7 @@ RUN dnf install -y \
   gettext \
   git \
   jq \
+  iptables \
   libffi-devel \
   libxslt-devel \
   make \
@@ -126,6 +128,14 @@ RUN wget -O /usr/local/bin/docker-compose "https://github.com/docker/compose/rel
   && chmod +x /usr/local/bin/docker-compose \
   && rm -rf /var/tmp/* /tmp/* /var/tmp/.???* /tmp/.???*
 
+# Install Podman. Get available versions by running the command `dnf list podman`
+ARG PODMAN_VERSION="2.2.1"
+ENV PODMAN_VERSION=${PODMAN_VERSION}
+RUN dnf -y install podman-${PODMAN_VERSION} \
+  && dnf clean all \
+  && rm -rf /var/cache/yum/ \
+  && rm -rf /var/tmp/* /tmp/* /var/tmp/.???* /tmp/.???*
+
 RUN useradd -ms /bin/bash anvil
 
 USER anvil