Docker file to build image for React App with Nginx

Dockerfile

# build stage
FROM node:12.2.0-alpine as build
WORKDIR /app
ENV PATH /app/node_modules/.bin:$PATH
COPY package.json /app/package.json
RUN npm install --silent
COPY . /app
RUN npm run build

# final stage
FROM nginx:1.16.0-alpine
COPY --from=build /app/build /usr/share/nginx/html
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]