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

COPY package.json package-lock.json* yarn.lock* pnpm-lock.yaml* ./
RUN \
  if [ -f yarn.lock ]; then yarn install --frozen-lockfile; \
  elif [ -f pnpm-lock.yaml ]; then corepack enable pnpm && pnpm install --frozen-lockfile; \
  else npm ci; \
  fi

# === Stage 2: build ===
FROM node:20-alpine AS builder
WORKDIR /app

COPY --from=deps /app/node_modules ./node_modules
COPY . .

ARG APP_ENV=production
ENV NEXT_PUBLIC_APP_ENV=$APP_ENV

RUN npm run build

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

ENV NODE_ENV=production

COPY --from=builder /app/public ./public
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static

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

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