blog 2021 final update

* a post about it
* new: steam, wikipedia tags
* new: enable post asset folders and automatically used as the post root

_config.yml

@@ -44,13 +44,13 @@ external_link:
   exclude: ''
 filename_case: 0
 render_drafts: false
-post_asset_folder: false
+post_asset_folder: true
 relative_link: false
 future: true
 highlight:
   enable: true
   line_number: true
-  auto_detect: false
+  auto_detect: true
   tab_replace: ''
   wrap: true
   hljs: false
@@ -59,6 +59,10 @@ prismjs:
   preprocess: true
   line_number: true
   tab_replace: ''
+marked:
+  prependRoot: true
+  postAsset: true
+
 
 # Home page setting
 # path: Root path for your blogs index page. (default = '')