PAYSTACK_PUBLIC_KEY=pk_test_17b2470304253f971819c36cf707c1a08be88a26
PAYSTACK_SECRET_KEY=sk_test_d90a4e57c81fe954b29d21bbe1169b2080465c9f
VOTE_PRICE=1000          # ₦ per vote
APP_URL=https://yourdomain.com   # required for Paystack webhooks