Resolve issues where docker pip install fails due to a cryptography dependency.

docker-pip3-cryptography-dependency

# https://github.com/odoo/odoo/issues/8849#issuecomment-322115976
# For APT
apt-get install libsasl2-dev python-dev libldap2-dev libssl-dev

# For APK
apk add python3-dev libffi-dev libressl-dev openldap-dev

# Example alpine docker file
FROM python:3.7-alpine

# Update packages
RUN apk update 

# Install python3 libs and pip3
RUN apk add python3-dev libffi-dev libressl-dev openldap-dev

# Install a C/C++ compiler
RUN apk add gcc g++

# Install timezone
RUN apk add --no-cache tzdata
ENV TZ America/Los_Angeles

# Add bash
RUN apk add --no-cache bash

# Upgrade pip and setuptools
RUN pip3 install --upgrade pip \
&& pip3 install --upgrade setuptools

# Install certificates store
RUN apk add ca-certificates \
&& rm -rf /var/cache/apk/*

# Install app dependencies
COPY requirements.txt requirements.txt
RUN pip3 install -r requirements.txt