Implemented zap logger in place of log | gprc echo

pkg/api/grpc/echo.go

@@ -2,7 +2,6 @@ package grpc
 
 import (
 	"context"
-	"log"
 
 	"github.com/stefanprodan/podinfo/pkg/api/grpc/echo"
 	"go.uber.org/zap"
@@ -15,6 +14,7 @@ type echoServer struct {
 }
 
 func (s *echoServer) Echo (ctx context.Context, message *echo.Message) (*echo.Message, error){
-	log.Printf("Received message body from client: %s", message.Body)
+	// Log level 0 for Info
+	s.logger.Log(0,"Received message body from client:", zap.String("input body", message.Body))
 	return &echo.Message {Body: message.Body}, nil
 }