React.js server dockerfile basic

docker-compose.yml

version: '3.5'

services:
  app:
    build: .
    volumes:
      - '.:/app'
    ports:
      - '3000:80'
    environment:
      - NODE_ENV=development

react.Dockerfile

## Build environment ##
FROM node as builder

# Create app directory
RUN mkdir -p /app
WORKDIR /app

# Install app dependencies
COPY package.json /app
COPY yarn.lock /app
RUN yarn

# Bundle app source
COPY . /app
RUN yarn build

## production environment ##
FROM nginx:1.15.0-alpine

# Copy Nginx conf
RUN rm -rf /etc/nginx/conf.d
COPY conf /etc/nginx

# Copy react code
COPY --from=builder /usr/src/app/build /usr/share/nginx/html

EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]