html, body, .container {
    height: 100%;
}
.container {
     display: -webkit-flexbox;
     display: -ms-flexbox;
     display: -webkit-flex;
     display: flex;
     -webkit-flex-align: center;
     -ms-flex-align: center;
     -webkit-align-items: center;
     align-items: center;
     justify-content: center;
 }
.container2 {
    margin-left: 20px;
}