Quiero dockerizar mi aplicación angular, pero recibo el siguiente error mientras construyo el Dockerfile.

Mi Dockerfile:

 FROM node:alpine as build-step WORKDIR /app COPY package.json ./ RUN npm install COPY . . RUN npm run build FROM nginx:alpine as prod-stage COPY --from=build-step /app/dist/angular-app /usr/share/nginx/html EXPOSE 80 CMD ["nginx", "-g", "daemon off;"]

Registro de errores:

 executor failed running [/bin/sh -c npm run build]: exit code: 1