fix: celery

compose.yml

@@ -88,7 +88,12 @@ services:
         target: /docker-entrypoint.sh
         mode: 0555
     entrypoint: /docker-entrypoint.sh
-    command: celery -A funkwhale_api.taskapp worker -l INFO
+    command:
+      - celery
+      - --app=funkwhale_api.taskapp
+      - worker
+      - --loglevel=${LOGLEVEL}
+      - --concurrency=${CELERYD_CONCURRENCY:-0}
     networks:
       - internal