PATH to per user Python install area should not be relative.

[GrahamDumpleton]

The Dockerfile's contain:

ENV PYTHON_VERSION=2.7 \
        PATH=.local/bin/:$PATH

Thus a relative path and not an absolute path is used to the per user Python install area used when running:

pip install --user -r requirements.txt

Presumably that relative path for the bind directory would become invalid if the web application being run changed the working directory to another directory. The consequence then would be that the web application would not then be able to find any programs which were installed as part of the Python modules installed by pip from the requirements.txt file.

Any directories in PATH should be absolute.

It should therefore use:

ENV PYTHON_VERSION=2.7 \
        PATH=$HOME/.local/bin/:$PATH

[GrahamDumpleton]

Issue #58 shows why a relative path is a problem, as pip changes the working directory when installing packages. As such, installation of a package may not work if relying on being able to find a program installed by a previously installed package.