Dockerfile

# Declare stage using amd64 base image
FROM --platform=linux/amd64 python:3.10.11-slim-buster as stage-amd64
# Declare stage using arm64 base image
FROM --platform=linux/arm64 arm64v8/python:3.10.11-slim-buster as stage-arm64

ARG TARGETARCH
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED=1

# Select final stage based on TARGETARCH ARG
FROM stage-${TARGETARCH} as final

ENV DIRPATH=/var/levenshtein-distance-service
WORKDIR $DIRPATH

RUN apt-get update && \
    apt-get -qy install \
        git \
        ssh \
        build-essential \
        libpq-dev \
        python-dev

COPY requirements.txt $DIRPATH/
RUN mkdir -pm 0600 ~/.ssh && ssh-keyscan github.com >> ~/.ssh/known_hosts
RUN --mount=type=ssh \
    pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir --upgrade setuptools  && \
    pip install --no-cache-dir --upgrade pip-tools && \
    pip install --no-cache-dir --upgrade -r requirements.txt && \
    rm -rf /var/lib/apt/lists/* && \
    apt-get -qy autoremove && \
    apt-get clean

# Copy the entire application code
COPY . $WORKDIR

# Now, be a web server.
EXPOSE 8080
CMD ["python", "manage.py", "runserver"]