Update docs

_docs/10-posts.md

@@ -0,0 +1,34 @@
+---
+title: "Working with Posts"
+permalink: /docs/posts/
+excerpt:
+sidebar:
+  title: "v3.0"
+  nav: docs
+---
+
+{% include base_path %}
+
+Posts are stored in the `_posts` directory and named according to the `YEAR-MONTH-DAY-title.MARKUP` format as per [the usual](https://jekyllrb.com/docs/posts/).
+
+**Recommended Front Matter Defaults:**
+
+```yaml
+defaults:
+  # _posts
+  - scope:
+      path: ""
+      type: posts
+    values:
+      layout: single
+      author_profile: true
+      read_time: true
+      comments: true
+      share: true
+      related: true
+```
+
+Adding the above to `_config.yml` will assign the `single` layout and enable: *author profile*, *reading time*, *comments*, *social sharing links*, and *related posts*, for all posts.
+
+**ProTip:** Remember to write unique `excerpt` descriptions for each post for improved SEO and archive listings.
+{: .notice--info}