Dockerfile

# Multi-stage build for better optimization
FROM node:18-alpine AS frontend-builder

WORKDIR /app/frontend

# Copy package files
COPY frontend/package*.json ./

# Clear npm cache and install dependencies
RUN npm cache clean --force && \
    (npm ci --no-audit --no-fund || npm install --no-audit --no-fund)

# Copy frontend source code
COPY frontend/ ./

# Build the frontend
RUN npm run build

# Python backend stage
FROM python:3.11-slim AS backend

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

WORKDIR /app

# Copy and install Python dependencies
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

# Copy built frontend from previous stage
COPY --from=frontend-builder /app/frontend/build ./frontend/build

# Set environment variables for containerized environments
ENV PORT=7860
ENV HOST=0.0.0.0
ENV FLASK_ENV=production
ENV PYTHONPATH=/app

# Hugging Face Spaces typically expects the app to be on port 7860 or the PORT env var
EXPOSE 7860

# Use our startup script which ensures directories are properly configured
CMD ["python", "startup_hf.py"]