Update package file (#3)

Author: db-cloudflare

package.json

@@ -8,6 +8,15 @@
     "start": "tsx src/index.ts",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
+  "files": [
+    "challenge_files/",
+    "media/",
+    "node_modules/",
+    "progress/",
+    "scaffolding/",
+    "src/",
+    "tsconfig.json"
+  ],
   "keywords": [],
   "author": "",
   "license": "ISC",