Revert "Will it work better this way?"

This reverts commit 5798fc3.

Author: iriark01

docs.json

@@ -3,23 +3,38 @@
         "description": "Introducing Mbed OS: the overview, architecture, features and licensing",
         "slug": "introduction",
         "type": "markdown",
-        "intro": {
+        "chapters": [{
+                "title": "Mbed OS overview",
+                "intro": {
                     "type": "markdown",
                     "url": "https://github.com/ARMmbed/mbed-os-5-docs/blob/development/docs/introduction/introduction.md"
                 },
-        "sources": [
-                {
+                "sources": []
+            },
+            {
+                "title": "Mbed OS 2 and Mbed OS 5",
+                "intro": {
                     "type": "markdown",
                     "url": "https://github.com/ARMmbed/mbed-os-5-docs/blob/development/docs/tutorials/mbed-os-2-vs-5.md"
                 },
-                {
+                "sources": []
+            },
+            {
+                "title": "Release process",
+                "intro": {
                     "type": "markdown",
                     "url": "https://github.com/ARMmbed/mbed-os-5-docs/blob/development/docs/introduction/release_process.md"
                 },
-                {
+                "sources": []
+            },
+            {
+                "title": "Glossary",
+                "intro": {
                     "type": "markdown",
                     "url": "https://github.com/ARMmbed/mbed-os-5-docs/blob/development/docs/introduction/terms.md"
-                }
+                },
+                "sources": []
+            }
         ],
         "tags": [
             "introduction"