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FROM python:3.10-slim
# 1) Install system deps (Graphviz provides `dot`)
USER root
RUN apt-get update && apt-get install -y --no-install-recommends \
graphviz \
&& rm -rf /var/lib/apt/lists/*
# 2) Create non-root user
RUN useradd -m -u 1000 user
ENV HOME=/home/user \
PATH=/home/user/.local/bin:$PATH
WORKDIR $HOME/app
# 3) Copy only requirements first for better caching
COPY requirements.txt $HOME/app/requirements.txt
RUN pip3 install --no-cache-dir -r requirements.txt
# 4) Copy the rest of the app
COPY . $HOME/app
# 5) Fix ownership (no 777 needed)
RUN chown -R user:user $HOME/app
USER user
# Optional: sanity check during build (remove later if you want)
# RUN which dot && dot -V
CMD ["python", "main.py"] |