index.css

#bannerImg {
  width: 100%;
  background: url('/imgs/banner.jpeg') 50% / cover;
  height: 300px;
  background-position: bottom;
}
.container {
    margin-bottom: 30px;
}

.navbar {
    margin-bottom: 0px;
    border-radius: 0px;
}

.col-md-4 {
    margin-top: 20px;
}

.well h3 {
    margin-top: 0px; 
}