fix lint

Author: mxssl

README.md

@@ -68,7 +68,7 @@ spec:
       terminationGracePeriodSeconds: 10
       containers:
         - name: exporter
-          image: mxssl/selectel-billing-exporter:1.0.1
+          image: mxssl/selectel-billing-exporter:1.0.2
           command: ["./app"]
           ports:
             - containerPort: 80

docker-compose.yml

@@ -4,7 +4,7 @@ services:
   selectel-billing-exporter:
     container_name: selectel-billing-exporter
     build: .
-    image: mxssl/selectel-billing-exporter:1.0.1
+    image: mxssl/selectel-billing-exporter:1.0.2
     ports:
       - "6789:80"
     restart: always

main.go

@@ -3,7 +3,7 @@ package main
 import (
 	"context"
 	"encoding/json"
-	"io/ioutil"
+	"io"
 	"log"
 	"net/http"
 	"os"
@@ -67,7 +67,7 @@ func main() {
 	log.Println("Устанавливаем Selectel токен...")
 	ok := false
 	TOKEN, ok = os.LookupEnv("TOKEN")
-	if ok != true {
+	if !ok {
 		log.Fatal("Переменная окружения TOKEN, которая должна содержать Selectel API ключ не установлена")
 	}
 	log.Println("Токен успешно установлен!")
@@ -192,7 +192,7 @@ func getSelectelBilling(selectelMetrics *selectelBillingResponse) error {
 		return err
 	}
 
-	temp, err := ioutil.ReadAll(resp.Body)
+	temp, err := io.ReadAll(resp.Body)
 	if err != nil {
 		return err
 	}

main_test.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-	"io/ioutil"
+	"os"
 	"testing"
 
 	"github.com/jarcoal/httpmock"
@@ -12,7 +12,7 @@ func TestSelectelBillingRequest(t *testing.T) {
 	httpmock.Activate()
 	defer httpmock.DeactivateAndReset()
 
-	testdata, err := ioutil.ReadFile("testdata/SelectelBillingRespExample.json")
+	testdata, err := os.ReadFile("testdata/SelectelBillingRespExample.json")
 	if err != nil {
 		t.Error(err)
 	}