Dockerfile

FROM python:3.12-slim AS builder

# Set working directory
WORKDIR /app

# Install build dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libffi-dev \
    python3-dev \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements file
COPY requirements.txt .

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

# Second stage: runtime
FROM python:3.12-slim

# Set working directory
WORKDIR /app

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    STREAMLIT_SERVER_PORT=8501 \
    STREAMLIT_SERVER_HEADLESS=true \
    STREAMLIT_BROWSER_GATHER_USAGE_STATS=false

# Install runtime dependencies for bcrypt
RUN apt-get update && apt-get install -y --no-install-recommends \
    libffi7 \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# Copy installed packages from builder stage
COPY --from=builder /usr/local/lib/python3.12/site-packages /usr/local/lib/python3.12/site-packages
COPY --from=builder /usr/local/bin /usr/local/bin

# Copy application code
COPY ./app /app

# Expose port
EXPOSE 8501

# Health check
HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
  CMD curl --fail http://localhost:8501/_stcore/health || exit 1

# Run the application
CMD ["streamlit", "run", "app.py"]