Remove init containers

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

packages/docker/prometheus/entrypoint.sh

@@ -0,0 +1,14 @@
+#!/usr/bin/env sh
+
+set -o errexit
+set -o nounset
+
+if [ -d /etc/prometheus/conf.d ]; then
+  # shellcheck disable=SC2016
+  yq eval-all '. as $item ireduce ({}; . *+ $item)' /etc/prometheus/conf.d/*.yaml > /etc/prometheus/prometheus.yaml
+fi
+
+exec prometheus \
+  --config.file=/etc/prometheus/prometheus.yaml \
+  --storage.tsdb.path=/var/lib/prometheus \
+  "$@"