adding side menu

pxtarget.json

@@ -102,6 +102,20 @@
                 "name": "Device",
                 "path": "/device"
             }
+        ],
+        "sideDocMenu": [
+            {
+                "name": "Getting started",
+                "path": "/getting-started"
+            },
+            {
+                "name": "Lessons",
+                "path": "/lessons"
+            },
+            {
+                "name": "Reference",
+                "path": "/reference"
+            }
         ]
     }
 }