Dockerfile

# Root Dockerfile (builds kalman-engine)
# This exists so `docker build -t kalman-engine .` works from repo root.

FROM python:3.11-slim

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    curl \
    && rm -rf /var/lib/apt/lists/*

# Install Python dependencies
COPY kalman-engine/requirements.txt ./requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Install additional runtime dependencies
RUN pip install \
    uvicorn[standard] \
    fastapi \
    redis \
    prometheus-client

# Copy source code
COPY kalman-engine/ ./

# Create non-root user
RUN addgroup --gid 1001 --system kalmanguard && \
    adduser --no-create-home --shell /bin/false --disabled-password --uid 1001 --system --group kalmanguard

# Set ownership
RUN chown -R kalmanguard:kalmanguard /app

USER kalmanguard

# Environment variables
ENV PYTHONUNBUFFERED=1
ENV PORT=8000

# Expose port
EXPOSE 8000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
    CMD curl -f http://localhost:8000/health || exit 1

# Start command
CMD ["python", "-m", "uvicorn", "api.main:app", "--host", "0.0.0.0", "--port", "8000"]