Add -logdir flag (#1039)

This allow configuring the various logs that may be outputted
(transcoder and future logs)

main.go

@@ -37,6 +37,7 @@ func main() {
 
 	configFile := flag.String("configFile", "config.yaml", "Config file path to migrate to the new database")
 	dbFile := flag.String("database", "", "Path to the database file.")
+	logDirectory := flag.String("logdir", "", "Directory where logs will be written to")
 	enableDebugOptions := flag.Bool("enableDebugFeatures", false, "Enable additional debugging options.")
 	enableVerboseLogging := flag.Bool("enableVerboseLogging", false, "Enable additional logging.")
 	restoreDatabaseFile := flag.String("restoreDatabase", "", "Restore an Owncast database backup")
@@ -58,6 +59,10 @@ func main() {
 	}
 	log.Infoln(config.GetReleaseString())
 
+	if *logDirectory != "" {
+		config.LogDirectory = *logDirectory
+	}
+
 	// Create the data directory if needed
 	if !utils.DoesFileExists("data") {
 		os.Mkdir("./data", 0700)