Dockerfile

FROM python:3.11-slim

# System deps (fonts help Pillow render crisp text)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential fonts-dejavu-core \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Make a writable home so Streamlit can store machine_id etc.
ENV HOME=/tmp
RUN mkdir -p /tmp/.streamlit && chmod -R 777 /tmp/.streamlit

# Python deps
COPY requirements.txt /app/requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# App code
COPY src /app/src

# Streamlit runtime
ENV STREAMLIT_SERVER_HEADLESS=true \
    STREAMLIT_SERVER_PORT=8501 \
    STREAMLIT_SERVER_ADDRESS=0.0.0.0 \
    STREAMLIT_BROWSER_GATHERUSAGESTATS=false

EXPOSE 8501
CMD ["streamlit", "run", "src/app.py"]