move config validation into a separate function

extensions/graph-explorer/pkg/config/parser/parse.go

@@ -30,5 +30,9 @@ func ParseConfig(cfg *config.Config) error {
 	// sanitize config
 	defaults.Sanitize(cfg)
 
+	return Validate(cfg)
+}
+
+func Validate(cfg *config.Config) error {
 	return nil
 }