chore: update to aura UID:GID, see aura#144

Dockerfile

@@ -2,9 +2,8 @@
 FROM savonet/liquidsoap:v2.1.0
 LABEL maintainer="David Trattnig <david.trattnig@subsquare.at>"
 
-ENV UID=1000
-ENV GID=1000
-ENV USER=app
+ENV AURA_UID=2872
+ENV AURA_GID=2872
 
 USER root
 
@@ -25,12 +24,12 @@ COPY config/sample.engine-core.docker.ini /srv/config/engine-core.ini
 COPY Makefile /srv/Makefile
 COPY VERSION /srv/VERSION
 
-RUN set -e \
-      && adduser --home /srv --no-create-home --system --uid ${UID} --group ${USER} \
-      && chown -R ${UID}:${GID} /srv /var/audio
+RUN groupadd --gid ${AURA_GID} aura && \
+      useradd --gid ${AURA_GID} --no-user-group --uid ${AURA_UID} --home-dir /srv --no-create-home aura && \
+      chown -R ${AURA_UID}:${AURA_GID}  /srv /var/audio
 
 
-USER app
+USER aura
 
 WORKDIR /srv
 

Makefile

@@ -29,6 +29,8 @@ AURA_AUDIO_STORE_SOURCE := ${CURDIR}/audio/source
 AURA_AUDIO_STORE_PLAYLIST := ${CURDIR}/audio/playlist
 AURA_AUDIO_STORE_FALLBACK := ${CURDIR}/audio/fallback
 AURA_LOGS := ${CURDIR}/logs
+AURA_UID := 2872
+AURA_GID := 2872
 
 DOCKER_RUN = @docker run \
 		--name $(APP_NAME) \
@@ -46,7 +48,7 @@ DOCKER_RUN = @docker run \
 		-v "$(AURA_AUDIO_STORE_FALLBACK)":"/var/audio/fallback":ro \
 		-v "$(AURA_LOGS)":"/srv/logs" \
 		-p 1234:1234 \
-		-u $(UID):$(GID) \
+		-u $(AURA_UID):$(AURA_GID) \
 		$(DOCKER_ENTRY_POINT) \
 		autoradio/$(APP_NAME)