Can't install psycopg2 due to missing pg_config

3

I gave up on using a builder and switched to a Dockerfile instead – I was getting unexplained timeouts when I specified a Paketo buildpack and the docs are pretty vague, so I Dockerised the app instead:

FROM python:alpine
RUN apk update \
    && apk add libpq postgresql-dev \
    && apk add build-base
COPY ./requirements.txt /app/requirements.txt
WORKDIR /app
RUN pip install -r requirements.txt
COPY . /app
CMD ["gunicorn", "-b", "0.0.0.0:8080", "--workers", "3", "app:app"]

Be sure to edit the top-level [build] section from your fly.toml to remove the builder and buildpacks keys and use the dockerfile by using the dockerfile = "Dockerfile" key, and ensure the PORT key in [env] matches the port you specify in your Dockerfile CMD. Note also that you’ll need to tune the workers setting in your Dockerfile to match the number of CPUs in your app – the rule of thumb is num CPUs * 2 + 1.

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