angular 9 dockerfile
FROM node:12.16.2-stretch-slim AS build COPY . /app WORKDIR /app RUN npm install && npm run build:prod && rm -rf node_modules/ FROM nginx:1.17.9-alpine as runtime COPY --from=build /app/default.conf /etc/nginx/conf.d/ COPY --from=build /app/dist/ /var/www EXPOSE 80