bingo: serve datacenter bingo on bingo.asxp.io

Add a second public site to the same process: a 5x5 card of the 25
largest Russian datacenters where a cell is crossed out once an incident
with a public source is recorded (Yandex Sasovo and Kaluga drone strikes
on 2026-10-08/09 are seeded). config.ru dispatches by Host, so it rides
the existing container, DB and bucket instead of a new deploy.

The card is localized ru/en/uk with per-locale columns falling back to
ru. Content is managed from /admin/bingo on asxp.io, reusing AdminAuth
and CSRF. Photos go to the existing bucket under bingo/ and are proxied
by the app, so the bucket stays private and storage needs no change.

The seed data was fact-checked against operator sites and press on
2026-10-10; several entries in the original list were wrong or vague.

Assisted-by: Claude:opus-5

.env.example

@@ -17,3 +17,6 @@ MAIL_TO=ie@asxp.io
 # CRYPTO_ADDRESSES={"BTC":"bc1...","USDT-TRC20":"T..."}
 # Legacy: LTC_ADDRESS still fills the LTC default when set.
 # LTC_ADDRESS=ltc1...
+
+# Datacenter bingo hostname (same process, routed by Host). Unset = bingo off.
+# BINGO_HOST=bingo.localhost