able to share static configuration between multiple server instances based on the homepath+iris.yml file with iris.WithGlobalConfiguration configurator

Former-commit-id: 3e528a3d01eb36b4c0781149e52acffd4dc5cf9f

_examples/configuration/from-yaml-file/shared-configuration/main.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"github.com/kataras/iris"
+)
+
+func main() {
+	app := iris.New()
+	app.Get("/", func(ctx iris.Context) {
+		ctx.HTML("<b>Hello!</b>")
+	})
+	// [...]
+
+	// Good when you share configuration between multiple iris instances.
+	// This configuration file lives in your $HOME/iris.yml for unix hosts
+	// or %HOMEDRIVE%+%HOMEPATH%/iris.yml for windows hosts, and you can modify it.
+	app.Run(iris.Addr(":8080"), iris.WithGlobalConfiguration)
+	// or before run:
+	// app.Configure(iris.WithGlobalConfiguration)
+	// app.Run(iris.Addr(":8080"))
+}