# Stage 1: Build
FROM node:18-alpine as builder

WORKDIR /app

# Copy package files
COPY package*.json ./

# Install dependencies
RUN npm ci

# Copy source code
COPY . .

# Build the application
RUN npm run build

# Stage 2: Run
FROM node:18-alpine

WORKDIR /app

# Install serve to run the application
RUN npm install -g serve

# Copy built application from builder
COPY --from=builder /app/dist ./dist

# Expose port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=10s --timeout=5s --retries=5 \
  CMD node -e "require('http').get('http://localhost:3000', (r) => {if (r.statusCode !== 200) throw new Error(r.statusCode)})"

# Start the application
CMD ["serve", "-s", "dist", "-l", "3000"]