backend/Dockerfile

# Build Stage
FROM python:3.10-slim as builder

WORKDIR /app

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1

# Install system dependencies required for building python packages
# ffmpeg is needed for audio processing
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    ffmpeg \
    && rm -rf /var/lib/apt/lists/*

# Install python dependencies
COPY requirements.txt .
RUN pip wheel --no-cache-dir --no-deps --wheel-dir /app/wheels -r requirements.txt


# Final Stage
FROM python:3.10-slim

WORKDIR /app

# Install runtime dependencies (ffmpeg)
RUN apt-get update && apt-get install -y --no-install-recommends \
    ffmpeg \
    && rm -rf /var/lib/apt/lists/*

# Copy wheels from builder
COPY --from=builder /app/wheels /wheels
COPY --from=builder /app/requirements.txt .

# Install dependencies from wheels
RUN pip install --no-cache /wheels/*

# Copy application code
COPY . .

# Create a non-root user
RUN addgroup --system app && adduser --system --group app
USER app

# Expose port
EXPOSE 8000

# Run commands
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]