use collections and provide rss feed for the blog

tsconfig.json

@@ -1,4 +1,5 @@
 {
+  "extends": "astro/tsconfigs/base",
   "compilerOptions": {
     // Enable top-level await, and other modern ESM features.
     "target": "ESNext",
@@ -10,6 +11,7 @@
     // Enable stricter transpilation for better output.
     "isolatedModules": true,
     // Astro will directly run your TypeScript code, no transpilation needed.
-    "noEmit": true
+    "noEmit": true,
+    "strictNullChecks": true
   }
 }