fixed alignment

www/index.html

@@ -122,7 +122,7 @@
                 <div class="col">
                   <img class="img-fluid" id="autodoc_home_modal_img" />
                 </div>
-                <div class="col-1 text-center">
+                <div class="col-1 autodoc_valign">
                   <i class="fas fa-3x fa-chevron-circle-left text-secondary"></i>
                 </div>
               </div>