enhance(backend): add unix socket support (#11275)

* unix socket support

* add changelog

* lint

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Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>

packages/backend/src/config.ts

@@ -14,7 +14,9 @@ export type Source = {
 	repository_url?: string;
 	feedback_url?: string;
 	url: string;
-	port: number;
+	port?: number;
+	socket?: string;
+	chmodSocket?: string;
 	disableHsts?: boolean;
 	db: {
 		host: string;