slight fixes to file structure in dockerfile

deployment/docker/Dockerfile

@@ -25,8 +25,8 @@ RUN python manage.py collectstatic
 #COPY broker/celeryd /etc/default/celeryd
 
 # nginx config and script to be run
-COPY docker/nginx.conf /etc/nginx/sites-available/default
-COPY docker/start.sh /usr/local/bin/start.sh
+COPY nginx.conf /etc/nginx/sites-available/default
+COPY start.sh /usr/local/bin/start.sh
 
 # set proper file permissions
 RUN chmod u+x /etc/init.d/celeryd && \