Remove fmt.Println and add Zerolog logging system

examples/grpcclient/main.go

@@ -3,23 +3,26 @@ package main
 import (
 	"context"
 	"encoding/json"
-	"fmt"
 	"io/ioutil"
 	"os"
 
 	"git.coopgo.io/coopgo-platform/mobility-accounts/grpcapi"
 	"git.coopgo.io/coopgo-platform/mobility-accounts/storage"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
 	"google.golang.org/grpc"
 )
 
 func main() {
+	zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+	log.Logger = log.Output(zerolog.ConsoleWriter{Out: os.Stderr})
 	if len(os.Args) < 2 {
-		fmt.Println("missing JSON file path")
+		log.Error().Msg("missing JSON file path")
 		return
 	}
 	conn, err := grpc.Dial("dns:///localhost:8090", grpc.WithInsecure(), grpc.WithDefaultServiceConfig(`{"loadBalancingPolicy":"round_robin"}`))
 	if err != nil {
-		panic(err)
+		log.Panic().Err(err).Msg("Cannot dial local server")
 	}
 
 	client := grpcapi.NewMobilityAccountsClient(conn)
@@ -46,5 +49,5 @@ func main() {
 		panic(err)
 	}
 
-	fmt.Println(string(jsonresponse))
+	log.Debug().Str("response", string(jsonresponse)).Msg("JSOn response")
 }