feat: implement pages

docs/en-gb/blog/_meta.json

@@ -0,0 +1,7 @@
+[
+  {
+    "type": "dir",
+    "name": "contents",
+    "label": "blog"
+  }
+]

docs/en-gb/blog/contents/use-of-gravatar.md

@@ -0,0 +1,5 @@
+---
+title: Use Gravatar in First-party Systems
+---
+
+Insert a `<img src="https://gravatar.com/avatar/$SHA256(email)/?d=identicon">`.

docs/en-gb/blog/index.md

@@ -0,0 +1,7 @@
+---
+title: Blog
+---
+
+# Blog
+
+Welcome to blog of OnixByte, we will share developing experiences here.