New DirOptions.Cache field for in-memory caching and pre-compression for the fastest possible static file server

Read HISTORY.md it contains a breaking change, second parameter of HandleDir should be iris.Dir(...) instead of just a string

relative to: https://github.com/kataras/iris/issues/1556#issuecomment-661057446


Former-commit-id: 14b48a06fb3b99287dff543932be2937a64233b9

_examples/dropzonejs/README.md

@@ -101,7 +101,7 @@ func main() {
     app.RegisterView(iris.HTML("./views", ".html"))
 
     // Make the /public route path to statically serve the ./public/... contents
-    app.HandleDir("/public", "./public")
+    app.HandleDir("/public", iris.Dir("./public"))
 
     // Render the actual form
     // GET: http://localhost:8080

_examples/dropzonejs/README_PART2.md

@@ -168,7 +168,7 @@ func main() {
     app := iris.New()
     app.RegisterView(iris.HTML("./views", ".html"))
 
-    app.HandleDir("/public", "./public")
+    app.HandleDir("/public", iris.Dir("./public"))
 
     app.Get("/", func(ctx iris.Context) {
         ctx.View("upload.html")

_examples/dropzonejs/src/main.go

@@ -121,7 +121,7 @@ func main() {
 	app := iris.New()
 	app.RegisterView(iris.HTML("./views", ".html"))
 
-	app.HandleDir("/public", "./public")
+	app.HandleDir("/public", iris.Dir("./public"))
 
 	app.Get("/", func(ctx iris.Context) {
 		ctx.View("upload.html")