# ---- Stage 1: Install dependencies ----
FROM node:20-alpine AS deps
WORKDIR /app

COPY package.json package-lock.json ./
RUN npm ci

# ---- Stage 2: Build the app ----
FROM node:20-alpine AS builder
WORKDIR /app

COPY package.json package-lock.json ./
RUN npm ci
COPY . .
RUN npm run build

# ---- Stage 3: Production image ----
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production

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

# Copy built artifacts
COPY --from=builder /app/public ./public
COPY --from=builder /app/package.json ./package.json

# Use standalone output if available, otherwise copy .next
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

# Ensure correct permissions
RUN chown -R nextjs:nodejs /app

USER nextjs

EXPOSE 3000
ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

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