Support mobile app local development access from devices over nip.io

bin/dev

@@ -45,4 +45,4 @@ else
   echo "Login with david@example.com to: http://fizzy.localhost:$PORT/"
 fi
 
-./bin/rails server -p $PORT
+./bin/rails server -b 0.0.0.0 -p $PORT

config/environments/development.rb

@@ -90,7 +90,8 @@ Rails.application.configure do
     "localhost",
     "127.0.0.1",
     /fizzy-\d+/,   # review apps: fizzy-123, fizzy-456:3000
-    /.*\.ts\.net/ # tailscale serve: hostname.tail1234.ts.net
+    /.*\.ts\.net/, # tailscale serve: hostname.tail1234.ts.net
+    /.*\.nip\.io/  # nip.io for mobile apps
   ]
 
   # Canonical host for mailer URLs (emails always link here, not personal Tailscale URLs)