Fix DB not closing on exit

main.go

@@ -40,6 +40,7 @@ var (
 )
 
 // TODO: Embed food.ddl and create DB if no exists
+// TODO: Add averages to graphs (ie. R2) https://stackoverflow.com/questions/60622195/how-to-draw-a-linear-regression-line-in-chart-js
 func main() {
 	dbpath := flag.String("db", "food.db", "Path to the database file")
 	flag.Parse()
@@ -50,6 +51,7 @@ func main() {
 		Error.Printf("%++v", err)
 		os.Exit(1)
 	}
+	defer db.Close()
 
 	settingsService = &SettingsService{db: &db}
 	err = settingsService.LoadSettings()