I was reading this thread on this subject. However, due to this being my first day of creating a site only focusing on bootstrap I'm still learning the basics so I do apologise in advance for any errors.
I was trying to centre all my content one after the other. However, my image doesn't look centred. How can I make it centred and aligned with the header and three boxes?
My full code is below.
.body {
  margin: 0;
  padding: 0;
}
.header-title {
  text-align: center;
  color: black;
  font-weight: bold;
  font-family: 'Roboto', sans-serif;
}
.intro-text {
  text-align: center;
  color: black;
  font-family: 'Roboto', sans-serif;
}
.p {
  text-align: center;
  color: black;
  font-family: 'Roboto', sans-serif;
}
.center-block {
  display: block;
  margin-left: auto;
  margin-right: auto;
  height: 250px;
  width: 250px;
  border-radius: 25px;
  background: #4D5061;
}<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<div class="container">
  <div class="header-title">
    <h1>ABOUT ME</h1>
  </div>
</div>
<div class="container">
  <div class="row">
    <div class="span4"><img class="center-block" src="http://i1126.photobucket.com/albums/l611/ldocherty1/IMG_0730_zpsiz4dqc47.jpg" /></div>
  </div>
  <div class="container">
    <div class="row">
      <div class="col-sm-4">
        <div class="well">
          <h3>Column 1</h3>
          <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit...</p>
          <p>Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris...</p>
        </div>
      </div>
      <div class="col-sm-4">
        <div class="well">
          <h3>Column 2</h3>
          <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit...</p>
          <p>Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris...</p>
        </div>
      </div>
      <div class="col-sm-4">
        <div class="well">
          <h3>Column 3</h3>
          <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit...</p>
          <p>Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris...</p>
        </div>
      </div>
    </div>
  </div> 
     
    