Docker-Setup: App-Image (standalone), PostgreSQL-Dienst mit Auto-Import, Dev-Profil

Dockerfile

@@ -0,0 +1,41 @@
+# =============================================================
+# 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"]