added button to unpin

src/index.js

@@ -20,6 +20,12 @@ async function initialize() {
         link.href = "https://dweb.link/ipfs/" + cid.toString();
         link.innerText = cid.toString();
         item.appendChild(link);
+        const unpin_button = document.createElement('button');
+        unpin_button.innerText = 'unpin';
+        unpin_button.onclick = async function() {
+            console.log('unpinned', await node.pin.rm(cid));
+        };
+        item.appendChild(unpin_button);
         pin_list.appendChild(item);
     }
     document.body.appendChild(pin_list);