Add node_modules and package-lock.json to .gitignore

Co-authored-by: mmcky <8263752+mmcky@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -2,4 +2,6 @@
 _build/
 lectures/_build/
 .ipynb_checkpoints/
-.virtual_documents/
+.virtual_documents/
+node_modules/
+package-lock.json

package.json

@@ -0,0 +1,15 @@
+{
+  "name": "lecture-python.myst",
+  "version": "1.0.0",
+  "description": "This website presents a set of lectures on quantitative economic modeling.",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "devDependencies": {
+    "netlify-cli": "^23.5.1"
+  }
+}