how to insert magnifying glass symbol in search box code example

Example: how to add magnifying glass to search box

input.hs-search-field__input {
    height: 50px;
    font-size: 14px;
    background-image: url(https://cdn2.hubspot.net/hubfs/4004166/bioticresearch_website_assets/images/search_icon.png);
    background-repeat: no-repeat;
    background-position: left center;
    padding-left: 40px;
    background-color: #fff;
    border: 1px solid #000;
    box-shadow: none;
    -webkit-appearance: none;
}