ClassicEditor.defaultConfig = {
      toolbar: {
        items: [
          'heading',
          '|',
          'bold',
          'italic',
          '|',
          'bulletedList',
          'numberedList',
          '|',
          'insertTable',
          '|',
          'imageUpload',
          '|',
          'undo',
          'redo'
        ]
      },
      image: {
        toolbar: [
          'imageStyle:full',
          'imageStyle:side',
          '|',
          'imageTextAlternative'
        ]
      },
      table: {
        contentToolbar: [ 'tableColumn', 'tableRow', 'mergeTableCells' ]
      },
      language: 'en'
    };