old_contents: // The Vue build version to load with the `import` command
  // (runtime-only or standalone) has been set in webpack.base.conf with an alias.
  import Vue from 'vue'
  import Main from './Main'
  import router from './router'
  
  /* eslint-disable no-new */
  new Vue({
      el: '#app',
      router,
      template: '<Main/>',
      components: {
          Main,
      }
  })
  
new_contents: // The Vue build version to load with the `import` command
  // (runtime-only or standalone) has been set in webpack.base.conf with an alias.
  import Vue from 'vue'
  import Main from './Main'
  import router from './router'
  import store from './store/'
  
  /* eslint-disable no-new */
  new Vue({
      el: '#app',
      router,
      store,
      template: '<Main/>',
      components: {
          Main,
      }
  })
  
subject: add vuex store to main.js