The app and bot services share env_file: .env, so the site's PORT=3000
leaked into the bot container. The bot code is `PORT || 4100`, so it
bound 3000 instead of 4100 — and the server's BOT_INTERNAL_URL
(http://bot:4100) then couldn't reach it, surfacing as "failed to fetch"
on the admin Discord Bot page even though the bot was otherwise healthy
and connected to Discord.
Pin PORT: 4100 on the bot service so it binds where the server expects.
Also override LOG_FILE: bot.log so the bot doesn't inherit the site's
LOG_FILE and write into app.log, keeping the two logs distinct.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019rao86n5cXpwAyjdBFEshV
