chore: update dependencies and modify Vercel configuration

- Added @vercel/node dependency to package.json
- Updated vercel.json to include framework null and reorganized functions section

Author: pphatdev

.env.example

@@ -1,6 +1,7 @@
 GITHUB_TOKEN=your_github_personal_access_token_here
 PORT=3102
 APP_ENV=production
+WARMUP_USERNAME=pphatdev
 
 # Database provider selection
 # cloudflare: use Cloudflare D1 over HTTP
@@ -9,9 +10,6 @@ DATABASE_PROVIDER=sqlite
 
 # Local SQLite file path (used when DATABASE_PROVIDER=sqlite)
 DATABASE_URL=./data/stats.db
-
-WARMUP_USERNAME=pphatdev
-
 # Cloudflare / Wrangler / D1
 # Used by drizzle.config.ts when running Drizzle commands against D1.
 # Required when DATABASE_PROVIDER=cloudflare.

.gitignore

@@ -23,3 +23,5 @@ Thumbs.db
 
 # Bun
 .bun/
+.vercel
+.env*.local