Use pipe fail, quote array expansion and prevent word globbing

Dockerfile

@@ -6,8 +6,8 @@ ENV URL_MLAT_CLIENT_REPO="https://github.com/wiedehopf/mlat-client.git" \
     PRIVATE_MLAT="false" \
     MLAT_INPUT_TYPE="auto"
 
-RUN set -x && \
-    TEMP_PACKAGES=() && \
+SHELL ["/bin/bash", "-o", "pipefail", "-x"]
+RUN TEMP_PACKAGES=() && \
     KEPT_PACKAGES=() && \
     # Git and net-tools are needed to install and run @Mikenye's HealthCheck framework
     KEPT_PACKAGES+=(git) && \
@@ -31,8 +31,8 @@ RUN set -x && \
     # Install all these packages:
     apt-get update -q -y && \
     apt-get install -o Dpkg::Options::="--force-confnew" -y --no-install-recommends -q \
-    ${KEPT_PACKAGES[@]} \
-    ${TEMP_PACKAGES[@]} && \
+    "${KEPT_PACKAGES[@]}" \
+    "${TEMP_PACKAGES[@]}" && \
     #
     # Compile and Install the mlat_client
     mkdir -p /git && \
@@ -45,7 +45,7 @@ RUN set -x && \
     rm -rf /git && \
     #
     # Clean up and install POST_PACKAGES:
-    apt-get remove -q -y ${TEMP_PACKAGES[@]} && \
+    apt-get remove -q -y "${TEMP_PACKAGES[@]}" && \
     # apt-get install -o Dpkg::Options::="--force-confnew" -y --no-install-recommends -q \
     # ${POST_PACKAGES[@]} && \
     apt-get autoremove -q -o APT::Autoremove::RecommendsImportant=0 -o APT::Autoremove::SuggestsImportant=0 -y && \
@@ -63,7 +63,7 @@ COPY rootfs/ /
 RUN set -x && \
     branch="##BRANCH##" && \
     [[ "${branch:0:1}" == "#" ]] && branch="main" || true && \
-    git clone --depth=1 -b $branch https://github.com/sdr-enthusiasts/docker-adsb-ultrafeeder.git /tmp/clone && \
+    git clone --depth=1 -b "$branch" https://github.com/sdr-enthusiasts/docker-adsb-ultrafeeder.git /tmp/clone && \
     pushd /tmp/clone && \
     echo "$(TZ=UTC date +%Y%m%d-%H%M%S)_$(git rev-parse --short HEAD)_$(git branch --show-current)" > /.CONTAINER_VERSION && \
     popd && \