Use npx for buildDocs script in package.json. This makes it platform independent

.gitignore

@@ -0,0 +1,4 @@
+/build/
+/node_modules/
+/.cache/
+/.idea/

package.json

@@ -8,7 +8,7 @@
     "lib": "lib"
   },
   "scripts": {
-    "buildDocs": "$(npm bin)/antora --stacktrace wiki-playbook.yml"
+    "buildDocs": "npx antora --stacktrace wiki-playbook.yml"
   },
   "private": true,
   "repository": {