synch the Dockerfile variants; require libatomic and ps command

docker/Dockerfile

@@ -28,7 +28,7 @@ FROM debian:buster-slim
 RUN mkdir -p /usr/local/bin /etc/ssl/certs
 # libsystemd: install the shared object, necessary in conjunction with      --volume "/var/run/dbus/system_bus_socket:/var/run/dbus/system_bus_socket"     to communicate with the host's dbus socket to configure systemd-resolved
 # iproute2: install /sbin/ip, necessary in conjunction with    --device="/dev/net/tun:/dev/net/tun"    to up the tun device, assign routes, and assign source IP 
-RUN apt-get -q update && apt-get -q install -y --no-install-recommends iproute2 libsystemd0
+RUN apt-get -q update && apt-get -q install -y --no-install-recommends iproute2 libsystemd0 procps libatomic1
 # Use 32-bit arm binaries on arm64 until we have 64-bit arm builds. This also affects fetch-github-releases.sh.
 RUN /bin/bash -c 'if [[ "$(uname -m)" == "aarch64" ]]; then dpkg --add-architecture armhf; apt update; apt install -y libc6:armhf; fi'
 COPY --from=fetch-ziti-artifacts /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs

docker/Dockerfile.copy

@@ -1,4 +1,4 @@
-FROM debian:bullseye-slim as fetch-ziti-artifacts
+FROM debian:buster-slim as fetch-ziti-artifacts
 
 # This build stage grabs artifacts that are copied into the final image.
 # It uses the same base as the final image to maximize docker cache hits.
@@ -26,13 +26,13 @@ COPY ${ARTIFACTS_DIR}/ziti-edge-tunnel .
 #
 ################
 
-FROM debian:bullseye-slim
+FROM debian:buster-slim
 
 ARG DOCKER_BUILD_DIR=./docker
 ARG ZITI_TUNNELER_BIN=ziti-edge-tunnel
 
 RUN mkdir -p /usr/local/bin /etc/ssl/certs
-RUN apt-get -q update && apt-get -q install -y --no-install-recommends iproute2 libsystemd0 openssl
+RUN apt-get -q update && apt-get -q install -y --no-install-recommends iproute2 libsystemd0 openssl procps libatomic1
 COPY --from=fetch-ziti-artifacts /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs
 COPY --from=fetch-ziti-artifacts /tmp/${ZITI_TUNNELER_BIN} /usr/local/bin
 COPY ${DOCKER_BUILD_DIR}/docker-entrypoint.sh /