Added back djworker (for celery)

Dockerfile

@@ -19,4 +19,7 @@ ADD . /code/
 RUN apt-get update && apt-get install -y sox lame vim ccze \
     libboost-program-options-dev libsox-fmt-mp3 postgresql-client rsync openssh-client
 
-RUN pip install -r requirements.txt
+RUN pip install -r requirements.txt
+
+RUN adduser --disabled-password --gecos '' djworker
+RUN chown djworker /files -R

run_celery.sh

@@ -1,2 +1,2 @@
 #!/bin/sh
-python manage.py celeryd
+su -m djworker -c "python manage.py celeryd"