fix(backend): ひとつのMeilisearchサーバーを複数のMisskeyサーバーで使えない問題を修正

packages/backend/src/config.ts

@@ -62,6 +62,7 @@ export type Source = {
 		port: string;
 		apiKey: string;
 		ssl?: boolean;
+		index: string;
 	};
 
 	proxy?: string;

packages/backend/src/core/SearchService.ts

@@ -68,7 +68,7 @@ export class SearchService {
 		private idService: IdService,
 	) {
 		if (meilisearch) {
-			this.meilisearchNoteIndex = meilisearch.index('notes');
+			this.meilisearchNoteIndex = meilisearch.index(`${config.meilisearch!.index}---notes`);
 			this.meilisearchNoteIndex.updateSettings({
 				searchableAttributes: [
 					'text',