fix: Add nixpacks configuration for Astro deployment

dealplustech-astro/node_modules/astro/tsconfigs/strict.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "./base.json",
+  "compilerOptions": {
+    // Enable strict mode. This enables a few options at a time, see https://www.typescriptlang.org/tsconfig#strict for a list.
+    "strict": true
+  }
+}