Bootstrap에서 아이콘을 사용하여 검색 입력 스타일을 지정하는 방법은 무엇입니까?

<div class="input-group">
  <input class="form-control border-end-0 border rounded-pill" type="text" value="search">

<div class="input-group col-md-4">
  <input class="form-control py-2" type="search" value="search">

<div class="row no-gutters">
  <div class="col">
    <input class="form-control border-secondary border-right-0 rounded-0" type="search" value="search">

<div class="input-group">
  <span class="input-group-prepend">
    <div class="input-group-text bg-transparent border-right-0">
      <i class="fa fa-search"></i>
    </div>
  </span>
  <input class="form-control py-2 border-left-0 border" type="search" value="...">