Rounded delete buttons

src/main/resources/public/js/main.js

@@ -59,6 +59,7 @@ const deleteButton = (shortUrl) => {
     const btn = document.createElement("button");
 
     btn.innerHTML = "×";
+    btn.setAttribute("style", "border-radius: 50%;");
 
     btn.onclick = e => {
         e.preventDefault();