styles.css

 /* Sticky footer styles-------------------------------------------------- */
        html {
            position: relative;
            min-height: 100%;
        }

        body {
            margin-bottom: 60px;
            /* Margin bottom by footer height */
        }

        .footer {
            position: absolute;
            bottom: 0;
            width: 100%;
            height: 60px;
            /* Set the fixed height of the footer here */
            line-height: 60px;
            /* Vertically center the text there */
            background-color: #f5f5f5;
        }

        /* End Sticky footer styles -------------------------------------------------- */
        #content img {
            display: block;
            margin-left: auto;
            margin-right: auto;
            width: 60vw;

        }