# ─── Stage 1: Install dependencies ───────────────────────────────────────────
FROM node:22-alpine AS deps

# Required for native bindings (e.g. sharp)
RUN apk add --no-cache libc6-compat

WORKDIR /app

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


# ─── Stage 2: Build the application ──────────────────────────────────────────
FROM node:22-alpine AS builder

WORKDIR /app

# Copy installed dependencies from deps stage
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Disable Next.js telemetry during build
ENV NEXT_TELEMETRY_DISABLED=1
ENV NODE_ENV=production

RUN npm run build


# ─── Stage 3: Production runner ───────────────────────────────────────────────
FROM node:22-alpine AS runner

WORKDIR /app

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

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

# Copy static assets
COPY --from=builder /app/public ./public

# Copy the standalone server output (requires output: 'standalone' in next.config.ts)
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static   ./.next/static

USER nextjs

EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

# server.js is generated by Next.js standalone output
CMD ["node", "server.js"]