Dockerfile

# Single-stage, slim image for a single deployable service.
FROM python:3.12-slim

ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    PIP_NO_CACHE_DIR=1

WORKDIR /app

# Install dependencies first to leverage layer caching.
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy the application.
COPY app ./app
COPY scripts ./scripts

# Persisted SQLite lives here; mount a volume to keep data across restarts.
ENV DATABASE_URL=sqlite:////data/interviewcoach.db
RUN mkdir -p /data

# Run as a non-root user.
RUN useradd --create-home --uid 10001 appuser && chown -R appuser /app /data
USER appuser

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
    CMD python -c "import urllib.request,sys; sys.exit(0 if urllib.request.urlopen('http://127.0.0.1:8000/health').status==200 else 1)"

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