JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>item1</li>
    <li>item2</li>
    <li>item3</li>
    <li>item4</li>
</ul>

CSS

ul {
    margin: 20px;
    padding: 20px 0 0 20px;
    list-style-type: none;
    line-height: 1.3;
    position: relative;
}

ul:before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0.55em;
    left: 0;
    border-left: 1px solid silver;
}

li {
    position: relative;
}

li:before {
    content: '\25cf';
    padding-right: 5px;
    
}

li:after {
    content: '';
    position: absolute;
    bottom: 0.55em;
    width: 20px;
    left: -20px;
    border-top: 1px solid silver;
}