Running `./bin/startup` for the very first time raises errors
root@ip-172-30-0-233:/opt/nuxeo-docker# ./bin/startup
Traceback (most recent call last):
File "gen.py", line 8, in <module>
from jinja2 import Template
ImportError: No module named jinja2
ERROR: Couldn't find env file: /opt/nuxeo-docker/nuxeo/private.env