bingo: serve bingo.asxp.io too, credit asxp.io in footer

datacenterbingo.xyz is not in the .xyz zone yet, while bingo.asxp.io
already resolves. Serve the card on both (BINGO_ALT_HOST) so it is
reachable now; canonical and hreflang links keep pointing at the .xyz
domain. Footer gets a copyright line linking back to asxp.io.

Assisted-by: Claude:opus-5

.env.example

@@ -20,3 +20,5 @@ MAIL_TO=ie@asxp.io
 
 # Datacenter bingo hostname (same process, routed by Host). Unset = bingo off.
 # BINGO_HOST=bingo.localhost
+# Optional second hostname serving the same card.
+# BINGO_ALT_HOST=bingo2.localhost

.forgejo/workflows/deploy.yaml

@@ -140,6 +140,7 @@ jobs:
             LTC_ADDRESS=${LTC_ADDRESS}
             CRYPTO_ADDRESSES=${CRYPTO_ADDRESSES}
             BINGO_HOST=datacenterbingo.xyz
+            BINGO_ALT_HOST=bingo.asxp.io
             EOF
             chmod 600 /opt/asxpio/.env
 

bingo_web.rb

@@ -2,13 +2,15 @@
 # AsxpioWeb (config.ru dispatches by Host). Read-only: no session, no CSRF.
 # Content is managed from asxp.io/admin/bingo (lib/bingo_admin.rb).
 class BingoWeb < Sinatra::Base
+  HOSTS = [ENV['BINGO_HOST'], ENV['BINGO_ALT_HOST']].compact.reject(&:empty?).freeze
+
   configure do
     set :root, $root
     set :views, File.join($root, 'views', 'bingo')
     set :erb, layout: :layout, escape_html: true
     set :show_exceptions, $env == 'development'
     set :host_authorization,
-        { permitted_hosts: $env == 'production' && ENV['BINGO_HOST'] ? [ENV['BINGO_HOST']] : [] }
+        { permitted_hosts: $env == 'production' ? HOSTS : [] }
   end
 
   helpers do

config.ru

@@ -2,16 +2,19 @@ require 'sinatra/base'
 require './asxpio.rb'
 require './bingo_web.rb'
 
-# One process, two sites: BINGO_HOST gets the bingo, everything else asxp.io.
-asxpio     = AsxpioWeb.new
-bingo      = BingoWeb.new
-bingo_host = ENV['BINGO_HOST']
+# One process, two sites: the bingo hosts get BingoWeb, everything else
+# asxp.io. BINGO_HOST is canonical (www. redirects to it); BINGO_ALT_HOST
+# serves the same card, e.g. while the canonical domain's DNS settles.
+asxpio      = AsxpioWeb.new
+bingo       = BingoWeb.new
+bingo_host  = ENV['BINGO_HOST']
+bingo_hosts = BingoWeb::HOSTS
 
 run lambda { |env|
   req = Rack::Request.new(env)
   if bingo_host && req.host == "www.#{bingo_host}"
     [301, { 'location' => "https://#{bingo_host}#{req.fullpath}" }, []]
   else
-    (bingo_host && req.host == bingo_host ? bingo : asxpio).call(env)
+    (bingo_hosts.include?(req.host) ? bingo : asxpio).call(env)
   end
 }

docker-compose.yml

@@ -19,8 +19,9 @@ services:
       - "traefik.http.routers.asxpio.service=asxpio"
       - "traefik.http.services.asxpio.loadbalancer.server.port=3000"
       # Datacenter bingo: same container, routed by Host in config.ru.
-      # BINGO_HOST is interpolated from /opt/asxpio/.env (written by deploy).
-      - "traefik.http.routers.asxpio-bingo.rule=Host(`${BINGO_HOST}`) || Host(`www.${BINGO_HOST}`)"
+      # BINGO_HOST / BINGO_ALT_HOST are interpolated from /opt/asxpio/.env
+      # (written by deploy).
+      - "traefik.http.routers.asxpio-bingo.rule=Host(`${BINGO_HOST}`) || Host(`www.${BINGO_HOST}`) || Host(`${BINGO_ALT_HOST}`)"
       - "traefik.http.routers.asxpio-bingo.entrypoints=websecure"
       - "traefik.http.routers.asxpio-bingo.tls=true"
       - "traefik.http.routers.asxpio-bingo.tls.certresolver=letsencrypt"

views/bingo/index.erb

@@ -62,7 +62,10 @@
     </ul>
   </section>
 
-  <footer><%= t(:footer) %></footer>
+  <footer>
+    <p><%= t(:footer) %></p>
+    <p>© <%= Date.today.year %> <a href="https://asxp.io">asxp.io</a></p>
+  </footer>
 </main>
 
 <% b.cells.each do |dc| %>

views/bingo/layout.erb

@@ -93,6 +93,7 @@
   dialog ul { padding-left: 18px; }
   dialog button { font: inherit; padding: 6px 14px; border-radius: 6px; border: 1px solid var(--line); background: var(--bg); color: var(--ink); cursor: pointer; }
   footer { margin-top: 32px; color: var(--muted); font-size: 13px; }
+  footer p { margin: 0 0 4px; }
   @media (max-width: 560px) {
     .cell { padding: 5px; border-radius: 6px; }
     .cell .sub, .cell .n, .cell .tag { display: none; }