Use tini as init for entrypoint script

Signed-off-by: Robert Dailey <rcdailey@gmail.com>

Dockerfile

@@ -1,6 +1,6 @@
 FROM alpine
 
-RUN apk add --no-cache docker bash
+RUN apk add --no-cache docker bash tini
 
 ENV NEXTCLOUD_EXEC_USER=www-data
 ENV NEXTCLOUD_CONTAINER_NAME=
@@ -10,7 +10,7 @@ ENV NEXTCLOUD_CRON_MINUTE_INTERVAL=15
 COPY scripts/*.sh /
 COPY scripts/cron-scripts /cron-scripts
 
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["tini", "--", "/entrypoint.sh"]
 
 HEALTHCHECK --timeout=5s \
     CMD ["/healthcheck.sh"]

scripts/entrypoint.sh

@@ -27,16 +27,5 @@ echo "$containerId" > /tmp/containerId
 echo "*/$NEXTCLOUD_CRON_MINUTE_INTERVAL * * * * /cron-tasks.sh $containerId" \
     > /var/spool/cron/crontabs/root
 
-# Watch for SIGTERM (someone stops the docker container) so we can tell crond to exit
-_term() {
-    echo "Caught SIGTERM signal!"
-    kill -TERM "$child" 2>/dev/null
-}
-
-trap _term SIGTERM
-
-exec crond -f -l 0 &
-echo "Started crond"
-
-child=$!
-wait "$child"
+echo "Starting crond"
+exec crond -f -l 0