2128 + service: Detect config file on service run correctly

Cose #2128

Squashed commit of the following:

commit cb7a58276fa97ac2e22bdbcb6d56c61415482e40
Author: ArtemBaskal <a.baskal@adguard.com>
Date:   Thu Sep 24 21:03:43 2020 +0300

    2128 + service: Detect config file on service run correctly

home/service.go

@@ -164,6 +164,8 @@ func handleServiceControlAction(opts options) {
 			log.Fatalf("Failed to run service: %s", err)
 		}
 	} else if action == "install" {
+		initConfigFilename(opts)
+		initWorkingDir(opts)
 		handleServiceInstallCommand(s)
 	} else if action == "uninstall" {
 		handleServiceUninstallCommand(s)