Add a proper user agent for API requests

src/lib/instance.ts

@@ -6,7 +6,12 @@
  * SPDX-License-Identifier: AGPL-3.0-only
  */
 
+import process from "node:process";
 import { supportedProjects } from "./project";
+import {
+	version,
+	repository,
+} from "../../package.json" assert { type: "json" };
 
 interface Instance {
 	domain: string;
@@ -25,6 +30,7 @@ const getInstancesForProject = async (
 				Accept: "*/*",
 				"Accept-Language": "en;q=1.0",
 				"Content-Type": "application/json",
+				"User-Agent": `Share2Fedi/${version} (+${repository.url}) node/${process.versions.node}`,
 			},
 			body: JSON.stringify({
 				query: `{nodes(status:"UP",softwarename:"${project}"){domain score active_users_monthly total_users}}`,