NGINX config to serve React Router V4 apps

nginx.default.conf

server {
  listen 80;
  server_name localhost;

  location /healthz {
    return 200 'OK';
    add_header Content-Type text/plain;
  }

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

  # redirect server error pages to the static page /50x.html
  error_page 500 502 503 504 /50x.html;
  location = /50x.html {
    root /usr/share/nginx/html;
  }
}