# =============================================================
# Next.js-App als eigenständiges Produktions-Image (Multi-Stage)
# Build:  docker compose --env-file .env.local build
# =============================================================

# ---------- Abhängigkeiten ----------
FROM node:24-alpine AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci

# ---------- Build ----------
FROM node:24-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# NEXT_PUBLIC_*-Variablen werden zur Build-Zeit ins Client-Bundle eingebacken
ARG NEXT_PUBLIC_SUPABASE_URL
ARG NEXT_PUBLIC_SUPABASE_ANON_KEY
ENV NEXT_PUBLIC_SUPABASE_URL=$NEXT_PUBLIC_SUPABASE_URL
ENV NEXT_PUBLIC_SUPABASE_ANON_KEY=$NEXT_PUBLIC_SUPABASE_ANON_KEY

RUN npm run build

# ---------- Runtime ----------
FROM node:24-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production
ENV PORT=3000
ENV HOSTNAME=0.0.0.0

RUN addgroup -S nodejs && adduser -S nextjs -G nodejs

COPY --from=builder /app/public ./public
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs
EXPOSE 3000
CMD ["node", "server.js"]