add one more project structure recommendation

_examples/project/api/configuration.go

@@ -0,0 +1,43 @@
+package api
+
+import (
+	"os"
+
+	"github.com/kataras/iris/v12"
+
+	"gopkg.in/yaml.v3"
+)
+
+// Configuration holds the necessary information
+// for our server, including the Iris one.
+type Configuration struct {
+	ServerName string `yaml:"ServerName"`
+	// The server's host, if empty, defaults to 0.0.0.0
+	Host string `yaml:"Host"`
+	// The server's port, e.g. 80
+	Port int `yaml:"Port"`
+	// If not empty runs under tls with this domain using letsencrypt.
+	Domain string `yaml:"Domain"`
+	// Enables write response and read request compression.
+	EnableCompression bool `yaml:"EnableCompression"`
+	// Defines the "Access-Control-Allow-Origin" header of the CORS middleware.
+	// Many can be separated by comma.
+	// Defaults to "*" (allow all).
+	AllowOrigin string `yaml:"AllowOrigin"`
+	// If not empty a request logger is registered,
+	// note that this will cost a lot in performance, use it only for debug.
+	RequestLog string `yaml:"RequestLog"`
+
+	// Iris specific configuration.
+	Iris iris.Configuration `yaml:"Iris"`
+}
+
+// BindFile binds the yaml file's contents to this Configuration.
+func (c *Configuration) BindFile(filename string) error {
+	contents, err := os.ReadFile(filename)
+	if err != nil {
+		return err
+	}
+
+	return yaml.Unmarshal(contents, c)
+}