fix lint alerts

pkg/docker/ratelimit.go

@@ -12,7 +12,7 @@ import (
 	"github.com/golang-jwt/jwt/v4"
 )
 
-type RateLimit struct {
+type rateLimit struct {
 	Limit     int
 	Remaining int
 }
@@ -61,29 +61,30 @@ func getToken() (string, error) {
 	return tokenString, nil
 }
 
-func GetRateLimit() (RateLimit, error) {
+// GetRateLimit get Docker Hub API rate limit
+func GetRateLimit() (rateLimit, error) {
 	token, err := getToken()
 	if err != nil {
-		return RateLimit{}, fmt.Errorf("get token: %w", err)
+		return rateLimit{}, fmt.Errorf("get token: %w", err)
 	}
 	url := "https://registry-1.docker.io/v2/ratelimitpreview/test/manifests/latest"
 	req, err := http.NewRequest("HEAD", url, nil)
 	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", token))
 	resp, err := http.DefaultClient.Do(req)
 	if err != nil {
-		return RateLimit{}, fmt.Errorf("get rate limit: %w", err)
+		return rateLimit{}, fmt.Errorf("get rate limit: %w", err)
 	}
 	defer resp.Body.Close()
 	limit, err := strconv.Atoi(strings.Split(resp.Header.Get("ratelimit-limit"), ";")[0])
 	if err != nil {
-		return RateLimit{}, fmt.Errorf("parse limit: %w", err)
+		return rateLimit{}, fmt.Errorf("parse limit: %w", err)
 	}
 	remaining, err := strconv.Atoi(strings.Split(resp.Header.Get("ratelimit-remaining"), ";")[0])
 	if err != nil {
-		return RateLimit{}, fmt.Errorf("parse remaining: %w", err)
+		return rateLimit{}, fmt.Errorf("parse remaining: %w", err)
 	}
 
-	return RateLimit{
+	return rateLimit{
 		Limit:     limit,
 		Remaining: remaining,
 	}, nil