Add a simple Caddy+Iris tutorial 👍

Former-commit-id: 8761afce72aa35b91c9b5a958f1cafc027aabddd

_examples/tutorial/caddy/server1/main.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"github.com/kataras/iris"
+)
+
+func main() {
+	app := iris.New()
+
+	templates := iris.HTML("./views", ".html").Layout("shared/layout.html")
+	app.RegisterView(templates)
+
+	app.Controller("/", new(Controller))
+
+	// http://localhost:9091
+	app.Run(iris.Addr(":9091"))
+}
+
+// Layout contains all the binding properties for the shared/layout.html
+type Layout struct {
+	Title string
+}
+
+// Controller is our example controller.
+type Controller struct {
+	iris.Controller
+
+	Layout Layout `iris:"model"`
+}
+
+// BeginRequest is the first method fires when client requests from this Controller's path.
+func (c *Controller) BeginRequest(ctx iris.Context) {
+	c.Controller.BeginRequest(ctx)
+
+	c.Layout.Title = "Home Page"
+}
+
+// Get handles GET http://localhost:9091
+func (c *Controller) Get() {
+	c.Tmpl = "index.html"
+	c.Data["Message"] = "Welcome to my website!"
+}