WSGI_PATH egrep matches .pyc files

Referring to this line:
https://github.com/aws/aws-eb-python-dockerfiles/blob/master/3.4.2-aws-eb-onbuild/uwsgi-start.sh#L9

WSGI_PATH=`find /var/app | egrep '/var/app/[^/]+/wsgi.py'`

If you run the command after .pyc have been compiled you get the results:

./mysite/wsgi.py
./mysite/wsgi.pyc

Which means the uwsgi command is set as:

uwsgi --http :8080 --wsgi-file mysite/wsgi.py mysite/wsgi.pyc

Which obviously fails. Ideally two things need to be updated:

1) Readme/instructions to clearly state .dockerignore file should contain .pyc (so pyc files aren't copied across)
2) Original command should be updated (to not match pyc files) e.g.

WSGI_PATH=`find /var/app | egrep '/var/app/[^/]+/wsgi.py$'`

Start with 3.4.2-aws-eb-onbuild/uwsgi-start.sh at the WSGI_PATH command referenced in the issue, then review the repository README or instructions for .dockerignore guidance. Verify that compiled .pyc files no longer produce an extra WSGI path and that the instructions clearly cover excluding them.

Written by the indexing model from the issue text.