I want to dockerise my angular application, but I get the following error while building the Dockerfile.

My 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;"]

Error log:

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