Fix up rocky 8 systemd

custom/testing/systemd-rockylinux-8.Dockerfile

@@ -3,22 +3,34 @@ FROM rockylinux:8
 COPY golden-pillar-tree golden-pillar-tree
 COPY golden-state-tree golden-state-tree
 
+SHELL ["/bin/bash", "-c"]
+
 RUN <<EOF
+  set -e
+
   if [ $(uname -m) = "x86_64" ]; then
     export ARCH=x86_64
   else
     export ARCH=arm64
   fi
+
   yum update -y
   yum install -y epel-release
-  yum install -y curl wget tar xz patchelf
+  yum install -y curl wget tar xz patchelf systemd
+
   wget https://packages.broadcom.com/artifactory/saltproject-generic/onedir/3007.1/salt-3007.1-onedir-linux-$ARCH.tar.xz
   tar xf salt-3007.1-onedir-linux-$ARCH.tar.xz
+
   ./salt/salt-call --local --pillar-root=/golden-pillar-tree --file-root=/golden-state-tree state.apply provision
+
   rm -rf salt
   rm -rf salt-3007.1-onedir-linux-$ARCH.tar.xz
   rm -rf golden-pillar-tree
   rm -rf golden-state-tree
 EOF
 
+COPY tail /usr/bin/tail
+COPY entrypoint.py /entrypoint.py
+RUN chmod +x /usr/bin/tail /entrypoint.py
+
 CMD ["/bin/bash"]