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This upgrade changes Puma’s production default bind from
0.0.0.0to::, but our Puma config only callsport ENV.fetch("PORT", 3000)and does not set a host explicitly. In environments where IPv6 is present but IPv4-mapped IPv6 is disabled (net.ipv6.bindv6only=1), the app will no longer accept IPv4 traffic on$PORT, causing production health checks or ingress connections to fail after this dependency bump.Useful? React with 👍 / 👎.