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42 lines
1.3 KiB
Docker
42 lines
1.3 KiB
Docker
# syntax=docker/dockerfile:1
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FROM python:3.13.8-slim as base
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# Prevents Python from writing pyc files.
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ENV PYTHONDONTWRITEBYTECODE=1
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# Keeps Python from buffering stdout and stderr to avoid situations where
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# the application crashes without emitting any logs due to buffering.
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ENV PYTHONUNBUFFERED=1
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WORKDIR /app
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# Create a non-privileged user that the app will run under.
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# See https://docs.docker.com/go/dockerfile-user-best-practices/
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ARG UID=10001
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RUN adduser \
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--disabled-password \
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--gecos "" \
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--home "/nonexistent" \
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--shell "/sbin/nologin" \
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--no-create-home \
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--uid "${UID}" \
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appuser
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RUN apt-get update
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RUN apt-get install -y build-essential libssl-dev python3-dev swig
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# Download dependencies as a separate step to take advantage of Docker's caching.
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# Leverage a cache mount to /root/.cache/pip to speed up subsequent builds.
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# Leverage a bind mount to requirements.txt to avoid having to copy them into
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# into this layer.
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RUN --mount=type=cache,target=/root/.cache/pip \
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--mount=type=bind,source=requirements.txt,target=requirements.txt \
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python -m pip install -r requirements.txt
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# Switch to the non-privileged user to run the application.
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USER appuser
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ADD smtprd_ng /app/smtprd_ng
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EXPOSE 8025
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CMD python smtprd_ng/smtprd.py --config /app/config.ini
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