frontend.Dockerfile

FROM node:12-slim as builder

WORKDIR /usr/src/app

COPY package.json .

COPY yarn*.lock .

RUN yarn --frozen-lockfile

COPY . .

RUN yarn build

FROM nginx:1.16.1-alpine as server

COPY --from=builder /usr/src/app/build /usr/share/nginx/html
COPY --from=builder /usr/src/app/nginx.conf /etc/nginx/conf.d/default.conf

nginx.conf

server {
  listen 80;

  location / {
    root /usr/share/nginx/html;
    index index.html index.htm;
    try_files $uri $uri/ /index.html =404;
  }
}