pfadi-bussle/pages/_app.js

import React from 'react'

import 'bootstrap/dist/css/bootstrap.min.css'
//import 'react-dates/lib/css/_datepicker.css'
import 'react-day-picker/lib/style.css'

import 'moment'
import 'moment/locale/de'

export default function MyApp({ Component, pageProps }) {
  return <Component {...pageProps} />
}