FROM node:20 AS builder WORKDIR /app COPY package*.json ./ RUN npm install COPY . . RUN npm run build || (echo "npm run build FEHLGESCHLAGEN" && exit 1) RUN echo "📁 Inhalt von /app nach Build:" && ls -la /app && ls -la /app/dist || true FROM nginx:alpine COPY --from=builder /app/dist /usr/share/nginx/html COPY nginx.conf /etc/nginx/conf.d/default.conf