Enforce pnpm usage and set Node.js version

.npmrc

@@ -0,0 +1 @@
+package-lock=false

.nvmrc

@@ -0,0 +1 @@
+24.13.0

package.json

@@ -2,11 +2,17 @@
   "name": "nikitapozd_website",
   "type": "module",
   "version": "0.0.1",
+  "engines": {
+    "node": "24.13.0",
+    "pnpm": ">=9.0.0"
+  },
+  "enginesStrict": true,
   "scripts": {
     "dev": "astro dev",
     "build": "astro build",
     "preview": "astro preview",
-    "astro": "astro"
+    "astro": "astro",
+    "preinstall": "node ./scripts/enforce-pnpm.mjs"
   },
   "dependencies": {
     "astro": "^5.16.10"

scripts/enforce-pnpm.mjs

@@ -0,0 +1,6 @@
+if (!process.env.npm_execpath || !process.env.npm_execpath.includes('pnpm')) {
+    console.error(
+        'Ошибка: используйте только `pnpm` для установки зависимостей (запускать: `pnpm install`).'
+    );
+    process.exit(1);
+}