full release edit capabilities oh my goodness gracious

Signed-off-by: ari melody <ari@arimelody.me>

admin/static/index.js

@@ -0,0 +1,24 @@
+const newReleaseBtn = document.getElementById("create-release");
+
+newReleaseBtn.addEventListener("click", event => {
+    event.preventDefault();
+    const id = prompt("Enter an ID for this release:");
+    if (id == null || id == "") return;
+
+    fetch("/api/v1/music", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({id})
+    }).then(res => {
+        if (res.ok) location = "/admin/release/" + id;
+        else {
+            res.text().then(err => {
+                alert("Request failed: " + err);
+                console.error(err);
+            });
+        }
+    }).catch(err => {
+        alert("Failed to create release. Check the console for details.");
+        console.error(err);
+    });
+});