refactor: migrate JSON function to new package

We now use it to help read remote docker registries also.

client/registry.go

@@ -1,7 +1,9 @@
 package client
 
 import (
-	"github.com/docker/distribution/reference"
+	"fmt"
+
+	"coopcloud.tech/abra/web"
 )
 
 type Tag struct {
@@ -13,7 +15,13 @@ type Tags []Tag
 
 var registryURL = "https://registry.hub.docker.com/v1/repositories/%s/tags"
 
-func ReadRegistryTags(image reference.Named, target interface{}) ([]string, error) {
-	// tagsUrl := fmt.Sprintf(registryURL, image.Name())
-	return nil, nil
+func GetRegistryTags(image string) (Tags, error) {
+	var tags Tags
+
+	tagsUrl := fmt.Sprintf(registryURL, image)
+	if err := web.ReadJSON(tagsUrl, &tags); err != nil {
+		return tags, err
+	}
+
+	return tags, nil
 }