ent/website: add docs structure

Reviewed By: alexsn

Differential Revision: D16782780

fbshipit-source-id: 084a50bc935597a5be8a5c04b2f9347e683ea45a

doc/website/sidebars.json

@@ -1,10 +1,24 @@
 {
   "md": {
-    "Getting Started": ["doc1"],
-    "First Category": ["doc2"],
-    "Second Category": ["doc3"]
-  },
-  "docs-other": {
-    "First Category": ["doc4", "doc5"]
+    "Getting Started": [
+      "getting-started"
+    ],
+    "Schema": [
+      "schema-def",
+      "schema-fields",
+      "schema-edges",
+      "schema-indexes"
+    ],
+    "Code Generation": [
+      "code-gen",
+      "crud",
+      "predicates",
+      "traversals",
+      "aggregate"
+    ],
+    "Migration": [
+      "migrate",
+      "dialects"
+    ]
   }
 }