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For anyone with this issue look at :
https://www.cocept.io/blog/development/using-pillow-on-amazon-elastic-beanstalk/
Basically your going to create a 01-flask.config
file that will hold what packages you need to install in linux server (using yum) to install your dependencies in requirements.txt
to install pillow on amazon ec2 i put
packages:
yum:
libjpeg-turbo-devel: []
libpng-devel: []
in the 01-flask.config
as it has the jpeg codecs
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