added cors header

utils/utils.go

@@ -34,6 +34,9 @@ type Conf struct {
 		APIKey        string `yaml:"api_key"`
 		RatePerSecond int    `yaml:"rate_per_sec"`
 	}
+	Httpd struct {
+		CORSAllowDomains string `yaml:"cors_allow_domains"`
+	}
 }
 
 type DBWithLock struct {