SHOPV3 HOTFIX 500 - APP_KEY / SHARED HOSTING
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Nguyen nhan da sua:
- Ban AUTO DOMAIN cu de APP_KEY= rong va thu ghi nguoc vao .env khi bootstrap.
- Tren mot so cPanel/shared hosting, PHP khong duoc ghi/rename .env -> Laravel co the boot voi key rong -> HTTP 500.
- Config cache cu voi APP_KEY rong cung co the giu loi 500.

Ban va moi:
- Khong ghi vao .env nua.
- Neu APP_KEY= rong, moi shop tu sinh key 32-byte rieng tai:
  storage/app/private/.shopv3-app-key
- Laravel storage/ von bat buoc writable, nen cach nay tuong thich hosting hon.
- Neu bootstrap/cache/config.php cu ton tai voi che do APP_KEY rong, bootstrap se xoa cache config de nap key moi.
- Hotfix KHONG chua .env, nen khong ghi de DB cua website dang chay.

Can tren hosting:
- storage/ phai writable boi PHP/cPanel user.
- bootstrap/cache/ phai writable.
- Khong xoa storage/app/private/.shopv3-app-key sau khi web da chay, vi do la APP_KEY cua shop.

Neu van 500 sau hotfix:
1. Kiem tra .env da dien dung DB_DATABASE / DB_USERNAME / DB_PASSWORD.
2. Kiem tra PHP >= 8.1.
3. Kiem tra storage/ va bootstrap/cache/ co quyen ghi.
4. Xem storage/logs/laravel.log hoac cPanel Errors de xac dinh loi tiep theo.
