FROM gcr.io/google-appengine/python

# Create a virtualenv for dependencies. This isolates these packages from

# system-level packages.

# Use -p python3 or -p python3.7 to select python version. Default is version 2.

RUN virtualenv /env -p python3

# Setting these environment variables are the same as running

# source /env/bin/activate.

ENV VIRTUAL_ENV /env

ENV PATH /env/bin:$PATH

RUN apt-get update && apt-get install -y python-opencv

# Copy the application's requirements.txt and run pip to install all

# dependencies into the virtualenv.

ADD requirements.txt /app/requirements.txt

RUN pip install -r /app/requirements.txt

# Add the application source code.

ADD . /app

# Run a WSGI server to serve the application. gunicorn must be declared as

# a dependency in requirements.txt.

CMD gunicorn -b :$PORT main:app