Example of Dockerfile to build Node app using multistage to lower its image size (without the large node_node modules).

NodeMultiStage.Dockerfile

# Stage 1 - the build process
FROM node:10-alpine as build-deps
WORKDIR /src
COPY package.json package-lock.json ./
RUN npm i --silent
COPY . ./
RUN npm run build

# Stage 2 - the production environment
FROM nginx:1.12-alpine
COPY --from=build-deps /src/build /usr/share/nginx/html
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]