Add examples

examples/function/main.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"context"
+
+	proto "github.com/micro/examples/function/proto"
+	"github.com/micro/go-micro/v2"
+)
+
+type Greeter struct{}
+
+func (g *Greeter) Hello(ctx context.Context, req *proto.HelloRequest, rsp *proto.HelloResponse) error {
+	rsp.Greeting = "Hello " + req.Name
+	return nil
+}
+
+func main() {
+	fnc := micro.NewFunction(
+		micro.Name("greeter"),
+	)
+
+	fnc.Init()
+
+	fnc.Handle(new(Greeter))
+
+	fnc.Run()
+}