Dockerfile

# Build stage
FROM python:3.12-slim-bullseye AS builder

WORKDIR /app

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

# Copy only the requirements file first to leverage Docker cache
COPY requirements.txt .

# Install Python dependencies
RUN pip install --no-cache-dir -r requirements.txt

# Final stage
FROM python:3.12-slim-bullseye

WORKDIR /app

# Copy installed dependencies 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 . .

# Create a non-root user and switch to it
RUN useradd -m appuser
USER appuser

# Expose the port the app runs on
EXPOSE 8501

# Run the application
CMD ["streamlit", "run", "domainsentry/streamlit_app.py", "--server.port=8501", "--server.address=0.0.0.0"]