diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 02bc640..f386a9c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,10 +1,10 @@
 name: Build image
 
-on: 
+on:
+  schedule:
+    - cron: '0 1 * * 0'
   push:
-    branches: [ main ]
-  pull_request:
-    branches: [ main ]
+    tags: [ 'v*.*.*' ]
 env:
   PHP_EXTENSION_INSTALL_VERSION: 'latest'
   COMPOSER_VERSION: 'latest'
diff --git a/README.md b/README.md
index 11d5e63..29062ae 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,21 @@
 # webman docker
 
-# 当开发环境使用
+[docker hub](https://hub.docker.com/r/krisss/docker-webman)
+
+- krisss/docker-webman:7.4-cli-alpine
+- krisss/docker-webman:8.0-cli-alpine
+- krisss/docker-webman:8.1-cli-alpine
+
+会通过 github actions 动态更新 php 的小版本，镜像 tag 名不变
+
+## 镜像中的组件
+
+- [php](https://hub.docker.com/_/php): extension 包含：bcmath、event、gd、mysqli、pdo_mysql、opcache、pcntl、redis、sockets、zip
+- [composer](https://getcomposer.org/)
+- [install-php-extensions](https://github.com/mlocati/docker-php-extension-installer)
+- [supervisor](http://supervisord.org/)
+
+## 当开发环境使用
 
 启动镜像
 
@@ -11,7 +26,7 @@ docker run --rm --name webman \
  -it \
  --privileged -u root \
  --entrypoint /bin/sh \
- kriss/docker-webman
+ krisss/docker-webman:7.4-cli-alpine
 ```
 
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