Dockerfile

# Hugging Face Spaces - Docker (frontend + FastAPI backend)
FROM node:20-bookworm-slim AS frontend-build
WORKDIR /frontend
COPY package.json package-lock.json ./
RUN npm ci
COPY . .
RUN npm run build

FROM python:3.11-slim AS runtime
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# System deps for opencv
RUN apt-get update && apt-get install -y --no-install-recommends \
    libgl1 libglib2.0-0 ffmpeg \
  && rm -rf /var/lib/apt/lists/*

WORKDIR /app
COPY requirements.txt /app/requirements.txt
RUN pip install --no-cache-dir -r /app/requirements.txt

# Copy backend + built static frontend
COPY backend /app/backend
COPY --from=frontend-build /frontend/dist /app/static

# Copy scaler + model into image
COPY scaler.save /app/scaler.save
COPY model.keras /app/model.keras

ENV STATIC_DIR=/app/static
EXPOSE 7860
CMD ["uvicorn", "backend.main:app", "--host", "0.0.0.0", "--port", "7860"]