Error when installing from wiki instructions

[robertritz]

I ran into an issue when installing ynr from the [production deployment wiki.] I got around the issue but wanted to let y'all know.

When running pip install -r requirements.txt Pillow failed to install. I used easy_install Pillow and it installed with no issues. I reran pip install -r requirements.txt and everything installed properly.

[robertritz]

I tried to replicate the solution later but couldn't. It appears the real issue is that I was missing libjpeg. I installed libjpeg-dev and it worked. Can anyone verify this is a needed resource?

[wfdd]

Yes, libjpeg-dev is required. For an up-to-date list of system dependencies for development, bar PostgreSQL and elasticsearch, see https://github.com/mysociety/yournextrepresentative/blob/master/conf/provision.sh#L7-L11.