Example Dockerfile to use as base

• Multistage, state one "FROM base as builder" builds code/libs
  • Second stage starts over "FROM base" and copies "--from=builder" files from first container.

• example Dockerfile

  FROM python:3.7-alpine as base
  FROM base as builder
  RUN mkdir /install
  WORKDIR /install
  COPY requirements.txt /requirements.txt
  RUN pip install --install-option="--prefix=/install" -r /requirements.txt
  
  
  FROM base
  COPY --from=builder /install /usr/local
  COPY src /app
  COPY README.md /
  WORKDIR /app
  #With entrypoint can pass commandline arguments
  ENTRYPOINT ["python" , "send-mail.py"]

• Dockerfile for serverless aws lambda build

  #PES 2020
  FROM debian:buster
  
  # Install Python3 with pip and devel
  # Install GCC, Make and MySQL-devel, NodeJS, Nano, findutils, and libyaml for parsing .yml (serverless) via Python
  # Clean-up after ourselves
  #RUN curl --silent --location https://rpm.nodesource.com/setup_8.x | bash - && \
  RUN apt-get update &&\ 
      apt-get upgrade -y &&\
      apt-get install -y \
          apt-utils \
          python3-pip python3-dev \
          python3-yaml \
          make \
          nodejs npm \
          vim findutils 
          git && \
       apt-get clean all && rm -rf /var/cache/apt
  
  # Install the serverless framework globally
  RUN npm install -g serverless
  
  # Install/upgrade pip, awscli, mysqlclient for both Python 2.7 and Python 3.6
  RUN ls -la /usr/local/bin
  RUN find / -iname "pip*"
  
  RUN pip-3 install --no-cache-dir --upgrade pip awscli mysqlclient pyyaml
    
  ENTRYPOINT ["/bin/bash"] 
  # "-c"]