Dockerfile for deploying a React app (created via CRA) in production

Dockerfile

# Stage 1 - build environment
FROM node:8.15-alpine as builder
WORKDIR /usr/src/app/
COPY . ./
RUN npm install --production
RUN npm run build
# Stage 2- production environment
FROM nginx:alpine
COPY nginx.conf /etc/nginx/conf.d/default.conf
COPY --from=builder /usr/src/app/build/ /usr/share/nginx/html/
EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]