Check config on load (#4170)

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

src/server/proxy/proxy-media.ts

@@ -69,7 +69,7 @@ async function fetch(url: string, path: string) {
 
 		const req = request({
 			url: requestUrl,
-			proxy: config.proxy,
+			proxy: config.proxy.getOrElse(null),
 			timeout: 10 * 1000,
 			headers: {
 				'User-Agent': config.user_agent