refactor: 启用 conf.UseEnv 并将 etc 配置统一为 env 占位

app/notification/api/etc/notifi-api.yaml

@@ -7,7 +7,9 @@ Prometheus:
   Port: 4001
   Path: /metrics
 
-# ===== DEV CONFIG =====
 NotificationRpcConf:
   Endpoints:
-    - notification-rpc:8080
+    - "${NOTIFICATION_RPC_TARGET}"
+
+Log:
+  Level: debug

app/notification/api/notifi.go

@@ -22,7 +22,7 @@ func main() {
 	flag.Parse()
 
 	var c config.Config
-	conf.MustLoad(*configFile, &c)
+	conf.MustLoad(*configFile, &c, conf.UseEnv())
 
 	server := rest.MustNewServer(c.RestConf)
 	server.Use(middlewares.NewHeaderExtractorMiddleware().Handle)