{%
     set classes = [
    'main-article',
    'main-article-page',
    ]
    %}
    {{ attach_library('classy/node') }}
     <article {{ attributes.addClass(classes) }}>

     <div class="main-article-image">
    {{ content.field_image }}
     </div>

     <div class="main-article-body">
    {{ content.body }}
     </div>

     </article>