Add admin panel: visit counter, product editor, screenshots upload

internal/config/config.go

@@ -11,6 +11,7 @@ type Config struct {
 	AdminEmail    string
 	AdminPassword string
 	SessionSecret string
+	UploadDir     string
 }
 
 func Load() Config {
@@ -18,6 +19,11 @@ func Load() Config {
 		AdminEmail:    os.Getenv("ADMIN_EMAIL"),
 		AdminPassword: os.Getenv("ADMIN_PASSWORD"),
 		SessionSecret: os.Getenv("SESSION_SECRET"),
+		UploadDir:     os.Getenv("UPLOAD_DIR"),
+	}
+
+	if cfg.UploadDir == "" {
+		cfg.UploadDir = "/app/data/uploads"
 	}
 
 	if cfg.SessionSecret == "" {