JSFiddle - React, Tailwind, and code Playground

HTML

<div class="wrapper">
   <div class="border-1"></div>
   <div class="border-2"></div>
</div>

CSS

body {
  background: #fff;
}

.wrapper {
  background: #fff;
  border: 2px solid pink;
  border-right: none;
  border-left: none;
  width: 80%;
  margin: 0 auto;
  height: 100px;
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.wrapper:before {
  content: '';
  display: inline-block;
  vertical-align: middle;
  position: absolute;
  top: 50%;
  left: -15px;
  width: 30px;
  height: 30px;
  background: #fff;
  transform: translateY(-50%) rotate(45deg);
  border-radius: 50%;
  border-top: 2px solid pink;
  border-right: 2px solid pink;
  z-index: 2;
}

.border-1 {
  display: inline-block;
  vertical-align: middle;
  position: absolute;
  content: '';
  top: 0;
  left: 0;
  width: 2px;
  height: 100px;
  background: pink;
}

.wrapper:after {
  content: '';
  display: inline-block;
  vertical-align: middle;
  position: absolute;
  top: 50%;
  right: -15px;
  width: 30px;
  height: 30px;
  background: #fff;
  transform: translateY(-50%) rotate(45deg);
  border-radius: 50%;
  border-bottom: 2px solid pink;
  border-left: 2px solid pink;
  z-index: 2;
}

.border-2 {
  display: inline-block;
  vertical-align: middle;
  position: absolute;
  content: '';
  top: 0;
  right: 0;
  width: 2px;
  height: 100px;
  background: pink;
}