feat(s3): enhance logging and public URL generation

Add detailed logging for S3 uploads in user and content services. Improve public URL generation logic in `S3Service` by providing better handling for `API_URL`, `DOMAIN_NAME`, and `PORT`. Update relevant tests to cover all scenarios.

backend/src/s3/s3.service.ts

@@ -158,17 +158,19 @@ export class S3Service implements OnModuleInit, IStorageService {
 
 	getPublicUrl(storageKey: string): string {
 		const apiUrl = this.configService.get<string>("API_URL");
-		if (apiUrl) {
-			return `${apiUrl.replace(/\/$/, "")}/media/${storageKey}`;
-		}
-
 		const domain = this.configService.get<string>("DOMAIN_NAME", "localhost");
 		const port = this.configService.get<number>("PORT", 3000);
 
-		if (domain === "localhost" || domain === "127.0.0.1") {
-			return `http://${domain}:${port}/media/${storageKey}`;
+		let baseUrl: string;
+
+		if (apiUrl) {
+			baseUrl = apiUrl.replace(/\/$/, "");
+		} else if (domain === "localhost" || domain === "127.0.0.1") {
+			baseUrl = `http://${domain}:${port}`;
+		} else {
+			baseUrl = `https://api.${domain}`;
 		}
 
-		return `https://api.${domain}/media/${storageKey}`;
+		return `${baseUrl}/media/${storageKey}`;
 	}
 }