Initial Montech monorepo: Nuxt landing, Vue admin, Nest API.

Scaffold SSR site with CMS/blog/gallery/SEO admin and deploy configs for montech.ir.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/.env.example

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+DATABASE_URL="postgresql://montech:montech@127.0.0.1:5432/montech?schema=public"
+PORT=3050
+JWT_SECRET="change-me-in-production"
+CORS_ORIGIN="http://localhost:3000,http://localhost:5174,https://montech.ir"
+UPLOADS_DIR=
+ADMIN_MOBILE=09121234567
+ADMIN_PASSWORD=change-me-strong
+ADMIN_NAME=Montech Admin