Add FreeRadius container (#675)

* Add radius container with logic to automatically add config

* fix typo

* donnot define a user

* whoops

* try adding goss

* switch to udp

containers/apps/freeradius/BASE

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+focal-20210609

containers/apps/freeradius/Dockerfile

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+ARG TARGETPLATFORM
+ARG VERSION
+# hadolint ignore=DL3007
+FROM freeradius/freeradius-server:${VERSION}
+
+SHELL ["/bin/bash", "-o", "pipefail", "-c"]
+
+# hadolint ignore=DL3008,DL3015,SC2086,SC2155
+RUN \
+  mkdir -p /defaults/raddb/ && \
+  cp -Rf /etc/raddb/* /defaults/raddb/
+
+COPY ./containers/apps/freeradius/entrypoint.sh /entrypoint.sh
+
+LABEL "maintainer"="TrueCharts <info@truecharts.org>"
+LABEL "org.opencontainers.image.source"="https://github.com/truecharts/apps"

containers/apps/freeradius/VERSION

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+3.0.23

containers/apps/freeradius/entrypoint.sh

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+#!/bin/sh
+set -e
+
+if [ -f "/etc/raddb/clients.conf" ]; then
+  echo "Radius config already exists, skipping config copy..."
+else
+  echo "Radius config does not exist copying..."
+  cp -Rf /defaults/raddb/* /etc/raddb/
+fi
+
+# this if will check if the first argument is a flag
+# but only works if all arguments require a hyphenated flag
+# -v; -SL; -f arg; etc will work, but not arg1 arg2
+if [ "$#" -eq 0 ] || [ "${1#-}" != "$1" ]; then
+    set -- freeradius "$@"
+fi
+
+# check for the expected command
+if [ "$1" = 'freeradius' ]; then
+    shift
+    exec freeradius -f "$@"
+fi
+
+# many people are likely to call "radiusd" as well, so allow that
+if [ "$1" = 'radiusd' ]; then
+    shift
+    exec freeradius -f "$@"
+fi
+
+# else default to run whatever the user wanted like "bash" or "sh"
+exec "$@"

containers/apps/freeradius/goss.yaml

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+---
+
+port:
+  udp:1812:
+    listening: true

containers/apps/freeradius/latest-base.sh

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+#!/usr/bin/env bash
+cat "./containers/base/ubuntu/VERSION"

containers/apps/freeradius/latest-version.sh

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+#!/usr/bin/env bash
+
+version=$(curl "https://registry.hub.docker.com/v1/repositories/freeradius/freeradius-server/tags" | jq --raw-output '.[].name' | grep -v layer | grep -v alpine | grep -v latest | tail -n1)
+version="${version#*v}"
+version="${version#*release-}"
+echo "${version}"