# Multi-stage Dockerfile for Next.js frontend
# Stage 1: Install dependencies and build the application
FROM node:20-alpine AS builder

# Set working directory
WORKDIR /app

# Copy package files
COPY package.json package-lock.json ./
COPY pnpm-lock.yaml ./

# Install pnpm and dependencies
RUN npm install -g pnpm
RUN pnpm install --no-frozen-lockfile

# Copy source code
COPY . .

# Build the application
RUN pnpm build

# Stage 2: Production image
FROM node:20-alpine AS runner

# Set environment variables
ENV NODE_ENV=production

# Create app directory
WORKDIR /app

# Create non-root user
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy built application from builder stage
COPY --from=builder --chown=nextjs:nodejs /app/public ./public
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone/. ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

# Switch to non-root user
USER nextjs

# Expose port
EXPOSE 3001

# Set environment variable for port
ENV PORT=3001

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