Dockerfile

# --- STAGE 1: Build the React Frontend ---
FROM node:20-slim AS frontend-builder
WORKDIR /app/frontend

# Install dependencies
COPY frontend/package*.json ./
RUN npm install

# Build the app
COPY frontend/ ./
RUN npm run build

# --- STAGE 2: Build the Python Backend ---
FROM python:3.10-slim
WORKDIR /app

# Install system dependencies (libgomp1 is vital for FAISS)
RUN apt-get update && apt-get install -y \
    libgomp1 \
    && rm -rf /var/lib/apt/lists/*

# Create a Hugging Face compatible user
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH
WORKDIR $HOME/app

# Install Python dependencies
COPY --chown=user backend/requirements.txt .
RUN pip install --no-cache-dir --user -r requirements.txt

# Copy the backend code
COPY --chown=user backend/ .

# COPY THE FRONTEND BUILD FROM STAGE 1
# This replaces your manual "copy-paste" step!
COPY --chown=user --from=frontend-builder /app/frontend/dist ./dist

# Hugging Face uses port 7860
EXPOSE 7860

# Run the app
CMD ["python", "-m", "uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]