Code:

<div class="feature-image"><img class="feature-image img-responsive" src="https://thietkewebvinhphuc.info/wp-content/uploads/2019/01/201512100957138607.jpg" alt="DAV MEDIA"></div>

<style>
.feature-image {
    position: relative;
    width: 233px;
    height: 173px;
    border-radius: 15px;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    float: left;
    margin-right: 25px;
}
.feature-image:before {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    top: 0;
    content: "";
    z-index: 1;
    border-radius: 15px;
    border: 5px rgba(255,255,255,.5) solid;
}
</style>