format README

README.md

@@ -1,12 +1,14 @@
 # cnblogs archiver
 
-## How can I help?
+## How can I help? 
+
+### Binary
 
 Go to [release](https://git.saveweb.org/saveweb/cnblogs/releases) page, downlaod `cnblogs_posts_list` and run it.
 
 WARNING: DO NOT run `cnblogs_posts_list` concurrently (on same IP), you may be banned by cnblogs.
 
-### Docker
+### With Docker
 
 ```bash
 export ARCHIVIST=<your_node_name> # a string that can uniquely identify your node (for example: bob-gcloud-514). (Legal characters: letters, numbers, -, _)
@@ -29,16 +31,14 @@ docker rm -f cnblogs \
 ```
 
 
----
-
-NOTE: `cnblogs_rss_detect` is finished, you don't need to run it. 
-
 ## Archiving stages
 
 ### stage1：detect all blogids (~~finished~~)
 
 run `cnblogs_rss_detect`
 
+NOTE: `cnblogs_rss_detect` is finished, you don't need to run it. 
+
 ### stage2：iterate all blogids and collect all posts' URLs (running)
 
 run `cnblogs_posts_list`