Update naming for better clarity (#155)

* Rename

* update naming

cmd/overlord/main.go

@@ -1,43 +0,0 @@
-package main
-
-import (
-	"context"
-	"math/rand"
-	"os"
-	"os/signal"
-	"time"
-
-	"github.com/giongto35/cloud-game/pkg/overlord"
-	"github.com/giongto35/cloud-game/pkg/util/logging"
-	"github.com/golang/glog"
-	"github.com/spf13/pflag"
-)
-
-func main() {
-	rand.Seed(time.Now().UTC().UnixNano())
-
-	cfg := overlord.NewDefaultConfig()
-	cfg.AddFlags(pflag.CommandLine)
-
-	logging.Init()
-	defer logging.Flush()
-
-	ctx, cancelCtx := context.WithCancel(context.Background())
-
-	glog.Infof("Initializing overlord server")
-	glog.V(4).Infof("Overlord configs %v", cfg)
-	o := overlord.New(ctx, cfg)
-	if err := o.Run(); err != nil {
-		glog.Errorf("Failed to run overlord server, reason %v", err)
-		os.Exit(1)
-	}
-
-	stop := make(chan os.Signal, 1)
-	signal.Notify(stop, os.Interrupt)
-	select {
-	case <-stop:
-		glog.Infoln("Received SIGTERM, Quiting Overlord")
-		o.Shutdown()
-		cancelCtx()
-	}
-}