reorganization of _examples and add some new examples such as iris+groupcache+mysql+docker

Former-commit-id: ed635ee95de7160cde11eaabc0c1dcb0e460a620

_examples/http-server/http3-quic/go.mod

@@ -0,0 +1,7 @@
+module github.com/kataras/iris/_examples/http-server/http3-quic
+
+go 1.14
+
+require (
+    github.com/prometheus/client_golang v1.0.0
+)

_examples/http-server/http3-quic/localhost.cert

@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----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=
+-----END CERTIFICATE-----

_examples/http-server/http3-quic/localhost.key

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----

_examples/http-server/http3-quic/main.go

@@ -0,0 +1,29 @@
+package main
+
+import (
+	"github.com/kataras/iris/v12"
+
+	"github.com/lucas-clemente/quic-go/http3"
+)
+
+/*
+	$ go get -u github.com/lucas-clemente/quic-go/...
+	# or if you're using GO MODULES:
+	$ go get github.com/lucas-clemente/quic-go@master
+*/
+
+func main() {
+	app := iris.New()
+
+	app.Get("/", func(ctx iris.Context) {
+		ctx.Writef("Hello from Index")
+	})
+
+	// app.Configure(iris.WithOptimizations, or any other core config here)
+	// app.Build()
+	// http3.ListenAndServe(":443", "./localhost.cert", "./localhost.key", app)
+	// OR:
+	app.Run(iris.Raw(func() error {
+		return http3.ListenAndServe(":443", "./localhost.cert", "./localhost.key", app)
+	}))
+}