add node data to seed and wipe scripts

data/seedDb.php

@@ -7,8 +7,24 @@ $texts = [
     ],
 ];
 
+$nodes = [
+    [
+        'id' => 0,
+        'title' => 'Chapter 1',
+        'textId' => 0,
+        'parentNodeId' => null,
+    ],
+    [
+        'id' => 1,
+        'title' => 'Section 1.1',
+        'textId' => 0,
+        'parentNodeId' => 0,
+    ],
+];
+
 $fileDataMap = [
     'texts.json' => $texts,
+    'nodes.json' => $nodes,
 ];
 
 foreach ($fileDataMap as $file => $data) {

data/wipeDb.php

@@ -2,6 +2,7 @@
 
 $files = [
     'texts.json',
+    'nodes.json',
 ];
 
 foreach ($files as $file) {