Dockerfile for React applications

Dockerfile

FROM node:15-alpine AS build
WORKDIR /app
ENV PATH /app/node_modules/.bin:$PATH
RUN apk add --no-cache --virtual yarn
COPY . /app
RUN yarn install --silent && \
    yarn global add react-scripts@4.0.1 --silent && \
    yarn run build

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