Dockerfile multi-stage for a minimal production-ready React app

Dockerfile

# Multistage Dockerfile
# STEP 1: build the Reac static files
FROM node:13.2.0-alpine as builder

# Create app directory and set a current directory
WORKDIR /app

# Copy the dependencies files
COPY package.json package-lock.json /app/

# Just install the production packages
ENV NODE_ENV production

# --no-optional not to try compile fsevent package
# That package is only needed on MacOS
RUN npm ci --no-optional

# Copy project files into the docker image
COPY .  /app/
RUN npm run build

# STEP 2: copy the static files and serve them with NGINX
FROM nginx:stable-alpine

# From 'builder' copy website to default nginx public folder
COPY --from=builder /app/build /usr/share/nginx/html

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