Dockerfile

###############################################
# Base Image
###############################################
FROM python:3.8.10 as python-base

# poetry env requirements
ARG PYTHONUNBUFFERED=1 \
 PYTHONDONTWRITEBYTECODE=1 \
 PIP_NO_CACHE_DIR=off \
 PIP_DISABLE_PIP_VERSION_CHECK=on \
 PIP_DEFAULT_TIMEOUT=100 \
 POETRY_VERSION=1.1.12 \
 POETRY_HOME="/opt/poetry" \
 POETRY_VIRTUALENVS_IN_PROJECT=true \
 POETRY_NO_INTERACTION=1 \
 PYSETUP_PATH="/opt/pysetup" \
 VENV_PATH="/opt/pysetup/.venv"
# prepend poetry and venv to path
ENV PATH="$POETRY_HOME/bin:$VENV_PATH/bin:$PATH"
# app variables
ENV FLASK_APP=app_run.py
ENV FLASK_ENV=development

###############################################
# Builder Image
###############################################
FROM python-base as builder-base
RUN apt-get update \
&& apt-get install --no-install-recommends -y \
# deps for installing poetry
curl \
# deps for building python deps
build-essential \
\
# install poetry - respects $POETRY_VERSION & $POETRY_HOME
&& curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | python

# copy project requirement files here to ensure they will be cached.
WORKDIR $PYSETUP_PATH
COPY poetry.lock pyproject.toml ./

# install runtime deps - uses $POETRY_VIRTUALENVS_IN_PROJECT internally
RUN poetry install --no-dev

# Copy required files
COPY . .

# Run Application
EXPOSE 5000
ENTRYPOINT flask run --host=0.0.0.0