Adds echo implementation of WS server

examples/echo/main.go

@@ -0,0 +1,41 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	_ "net/http/pprof"
+	"os"
+
+	"github.com/ksysoev/wasabi"
+	"github.com/ksysoev/wasabi/channel"
+	"github.com/ksysoev/wasabi/dispatch"
+	"github.com/ksysoev/wasabi/server"
+)
+
+const (
+	Addr = ":8080"
+)
+
+func main() {
+
+	slog.LogAttrs(context.Background(), slog.LevelDebug, "")
+
+	backend := dispatch.RequestHandlerFunc(func(conn wasabi.Connection, req wasabi.Request) error {
+		return conn.Send(wasabi.MsgTypeText, req.Data())
+	})
+
+	dispatcher := dispatch.NewPipeDispatcher(backend)
+	channel := channel.NewChannel("/", dispatcher, channel.NewConnectionRegistry(), channel.WithOriginPatterns("*"))
+
+	server := server.NewServer(Addr, server.WithBaseContext(context.Background()))
+	server.AddChannel(channel)
+
+	if err := server.Run(); err != nil {
+		slog.Error("Fail to start app server", "error", err)
+		os.Exit(1)
+	}
+
+	fmt.Println("Server is stopped")
+	os.Exit(0)
+}