INSTANCED_CONTENT: "true" caused the game channel to register as
instanced (channelId=0), but FirstChannel() only returns non-instanced
channels, resulting in "server not found" on character select.
Changed to INSTANCED_CONTENT: "false" so channel registers as id=1.
Updated port mapping from 20002/21002 to 20003/21003 (base + channelId).
Added GRPC_LOGIN_IP env var to world service.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>