Rationalized the default configuration file path and updated documentation

internal/adapter/cli/run.go

@@ -450,7 +450,16 @@ func (c *serveConfig) addrIfSet(fs *flag.FlagSet) string {
 }
 
 func registerConfigPathFlag(fs *flag.FlagSet, target *string) {
-	fs.StringVar(target, "config", "", fmt.Sprintf("application config path (default %s)", appconfig.DefaultConfigPath))
+	fs.StringVar(
+		target,
+		"config",
+		"",
+		fmt.Sprintf(
+			"application config path (default search: %s, then %s)",
+			appconfig.DefaultConfigPathLocal,
+			appconfig.DefaultConfigPath,
+		),
+	)
 }
 
 func resolveAppSettings(fs *flag.FlagSet, configPath string, overrides appconfig.CLIOverrides) (appconfig.AppSettings, error) {