Enable Next.js standalone mode and simplify Dockerfile copy block

Dockerfile

@@ -23,28 +23,15 @@ FROM node:20-alpine AS runner
 
 WORKDIR /app
 
-# Copy only built assets and runtime dependencies
-COPY --from=builder /app/.next ./.next
-# Copy standalone server and static assets
-COPY --from=builder /app/.next/standalone ./
-COPY --from=builder /app/.next/static ./.next/static
-# KORREKTUR: Kopiert den public-Ordner nur, wenn er wirklich existiert
+# Statische Assets kopieren (wichtig für die Chunks/404-Fehler von vorhin)
 COPY --from=builder /app/public* ./public
+COPY --from=builder /app/.next/static ./.next/static
 
-COPY --from=builder /app/package*.json ./
-# KORREKTUR: Flexibles Kopieren der Next-Konfiguration (egal ob .js oder .mjs)
-COPY --from=builder /app/next.config.* ./
-# KORREKTUR: Optionale TS-Dateien über den Sternchen-Trick absichern
-COPY --from=builder /app/tsconfig.jso* ./
-COPY --from=builder /app/next-env.d.t* ./
-# Install production dependencies (already installed in builder, but ensure they are present)
-RUN npm ci --omit=dev
-
-# Environment variables
-ENV NODE_ENV=production
-ENV PORT=3000
+# Den fertigen Standalone-Server kopieren
+COPY --from=builder /app/.next/standalone ./
 
 EXPOSE 3000
+ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
 
-# Start the Next.js server (standalone)
 CMD ["node", "server.js"]