# Multi-stage build for ARM compatibility (Raspberry Pi)
FROM node:18-alpine AS builder

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci --only=production

# Copy source code
COPY . .

# --- Production stage ---
FROM node:18-alpine

# Install curl for health checks
RUN apk add --no-cache curl

WORKDIR /app

# Copy dependencies from builder
COPY --from=builder /app/node_modules ./node_modules
COPY --from=builder /app .

# Create uploads directory
RUN mkdir -p uploads

# Expose port
EXPOSE 5000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=40s \
  CMD node -e "require('http').get('http://localhost:5000/api/health', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"

# Start server
CMD ["node", "server.js"]