Dockerfile

FROM python:3.9-slim

ENV PYTHONUNBUFFERED=1

# Install tkinter system libraries
RUN apt-get update && apt-get install -y \
    python3-tk \
    tk \
    tk-dev \
    libtk8.6 \
    && rm -rf /var/lib/apt/lists/*

# Create user
RUN useradd -m -u 1000 user

WORKDIR /app

COPY requirements.txt .

RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

COPY . .

RUN chown -R user:user /app

USER user

EXPOSE 7860

CMD ["python", "app.py"]