bring Dockerfile to Modern Era

Dockerfile

@@ -1,35 +1,18 @@
 
-FROM debian:stable-slim
-
-ENV S6_BEHAVIOUR_IF_STAGE2_FAILS=2
+FROM ghcr.io/sdr-enthusiasts/docker-baseimage:base
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
-# Copy needs to be here to prevent github actions from failing.
-# SSL Certs are pre-loaded into the root_certs via a job in github action:
-# See: "Copy CA Certificates from GitHub Runner to Image rootfs" in deploy.yml
-COPY root_certs/ /
-
 # Now install all the packages and perform basic config:
 RUN set -x && \
 # define packages needed for installation and general management of the container:
     TEMP_PACKAGES=() && \
     KEPT_PACKAGES=() && \
-    # Required for building multiple packages.
-    TEMP_PACKAGES+=(git) && \
-    TEMP_PACKAGES+=(wget) && \
     # logging
     KEPT_PACKAGES+=(gawk) && \
     KEPT_PACKAGES+=(pv) && \
-    # required for S6 overlay
-    # curl kept for healthcheck
-    # ca-certificates kept for python
-    TEMP_PACKAGES+=(gnupg2) && \
-    TEMP_PACKAGES+=(file) && \
-    TEMP_PACKAGES+=(curl) && \
-    KEPT_PACKAGES+=(ca-certificates) && \
     # a few KEPT_PACKAGES for debugging - they can be removed in the future
-    KEPT_PACKAGES+=(procps nano aptitude netcat) && \
+    KEPT_PACKAGES+=(procps nano) && \
 #
 # define packages needed for noisecapt
     KEPT_PACKAGES+=(jq) && \
@@ -45,16 +28,11 @@ RUN set -x && \
         ${KEPT_PACKAGES[@]} \
         ${TEMP_PACKAGES[@]} \
         && \
-    git config --global advice.detachedHead false && \
 #
 # Do some other stuff
-    echo "alias dir=\"ls -alsv\"" >> /root/.bashrc && \
-#
-# install S6 Overlay
-    curl -s https://raw.githubusercontent.com/mikenye/deploy-s6-overlay/master/deploy-s6-overlay.sh | sh && \
-#
+    echo "alias dir=\"ls -alsvh\"" >> /root/.bashrc && \
 # Clean up
-    apt-get remove -y ${TEMP_PACKAGES[@]} && \
+    if (( ${#TEMP_PACKAGES[*]} > 0 )); then apt-get remove -y ${TEMP_PACKAGES[@]}; fi && \
     apt-get autoremove -o APT::Autoremove::RecommendsImportant=0 -o APT::Autoremove::SuggestsImportant=0 -y && \
     apt-get clean -y && \
     rm -rf /tmp/* /var/lib/apt/lists/*