backwards bool in main

src/main.go

@@ -17,9 +17,9 @@ func Main(ctx context.Context) error {
 	defer reader.Close()
 
 	interval := time.Millisecond * 50
-	if intervalS := os.Getenv("MAIN_INTERVAL_DURATION"); intervalS != "" {
+	if intervalS := os.Getenv("MAIN_INTERVAL_DURATION"); intervalS == "" {
 	} else if v, err := time.ParseDuration(intervalS); err != nil {
-		panic(err)
+		return err
 	} else {
 		interval = v
 	}