perf(server): improvement of external mediaProxy (#9787)

* perf(server): improvement of external mediaProxy

* add a comment

* ✌️

* /filesでsharpの処理を行わずリダイレクトする

* fix

* thumbnail => static

* Fix #9788

* add avatar mode

* add url

* fix

* static.webp

* remove encodeURIComponent from media proxy path

* remove existance check

packages/backend/src/server/web/UrlPreviewService.ts

@@ -33,7 +33,7 @@ export class UrlPreviewService {
 	private wrap(url?: string): string | null {
 		return url != null
 			? url.match(/^https?:\/\//)
-				? `${this.config.url}/proxy/preview.webp?${query({
+				? `${this.config.mediaProxy}/preview.webp?${query({
 					url,
 					preview: '1',
 				})}`