feat: add cli flags

cli/purge.go

@@ -1,10 +1,7 @@
 package cli
 
 import (
-	"net/http"
-
 	npmproxy "github.com/emeralt/npm-cache-proxy/proxy"
-	"github.com/go-redis/redis"
 	"github.com/spf13/cobra"
 )
 
@@ -13,13 +10,11 @@ var purgeCmd = &cobra.Command{
 	Use:   "purge",
 	Short: "Purge all cached packages",
 	Run: func(cmd *cobra.Command, args []string) {
-		proxy := npmproxy.Proxy{
-			RedisClient: redis.NewClient(&redis.Options{}),
-			HttpClient: &http.Client{
-				Transport: http.DefaultTransport,
-			},
-			GetOptions: getOptions,
-		}
+		proxy := getProxy(func() (npmproxy.Options, error) {
+			return npmproxy.Options{
+				RedisPrefix: persistentOptions.RedisPrefix,
+			}, nil
+		})
 
 		err := proxy.PurgeMetadata()
 		if err != nil {