improve shutdown and app service boilerplate

pkg/config/custom.go

@@ -1,13 +1,14 @@
-// This serves as a reference sample configuration
-// to show how to merge custom config fields into
-// go-app configuration
+// Package config contains ServiceConfig, which is intended
+// to extend go-app/pkg/config.AppConfig. Add any custom fields
+// here, and it will automatically be handled by go-app, including
+// overrides by environment, and json schema generation
 package config
 
 import (
 	"gitea.libretechconsulting.com/rmcguire/go-app/pkg/config"
 )
 
-type DemoConfig struct {
+type ServiceConfig struct {
 	Timezone string    `yaml:"timezone" json:"timezone,omitempty" default:"UTC"`
 	Opts     *DemoOpts `yaml:"opts" json:"opts,omitempty"`