fix: add cache decorator when getting ip address

Author: Fatme

lib/services/ip-service.ts

@@ -1,9 +1,12 @@
+import { cache } from "../common/decorators";
+
 export class IPService implements IIPService {
 	private static GET_IP_TIMEOUT = 1000;
 	constructor(private $config: IConfiguration,
 		private $httpClient: Server.IHttpClient,
 		private $logger: ILogger) { }
 
+	@cache()
 	public async getCurrentIPv4Address(): Promise<string> {
 		const ipAddress = await this.getIPAddressFromServiceReturningJSONWithIPProperty(this.$config.WHOAMI_URL_ENDPOINT) ||
 			await this.getIPAddressFromServiceReturningJSONWithIPProperty("https://api.myip.com") ||