# Multi-stage build for Node.js frontend application
FROM node:20-alpine AS builder

# Install yarn
RUN apk add --no-cache yarn

# Set working directory
WORKDIR /app

# Copy package files
COPY package.json yarn.lock ./

# Install dependencies
RUN yarn install --frozen-lockfile

# Copy source code
COPY . .

# Build the application
RUN yarn build

# Production stage
FROM node:20-alpine AS production

# Install yarn for production
RUN apk add --no-cache yarn

# Create app user
RUN addgroup -g 1001 -S nodejs
RUN adduser -S nextjs -u 1001

# Set working directory
WORKDIR /app

# Copy package files
COPY package.json yarn.lock ./

# Install only production dependencies
RUN yarn install --frozen-lockfile --production && yarn cache clean

# Copy built application from builder stage
COPY --from=builder --chown=nextjs:nodejs /app/dist ./dist

# Switch to non-root user
USER nextjs

# Expose the application port
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
  CMD node -e "require('http').get('http://localhost:3000/health', (res) => { process.exit(res.statusCode === 200 ? 0 : 1) }).on('error', () => process.exit(1))"

# Command to run the application
CMD ["yarn", "start"]