Move flag handling into cmd/

cmd/rushlink/main.go

@@ -10,9 +10,12 @@ import (
 )
 
 func main() {
+	var databasePath, fileStorePath string
+
+	flag.StringVar(&databasePath, "database", "", "Location of the database file")
 	flag.Parse()
 
-	if err := db.Open(); err != nil {
+	if err := db.Open(databasePath); err != nil {
 		log.Fatalln(err)
 	}
 	defer db.Close()