fix: default LOG_LEVEL to info in production

Debug logging in production is unnecessarily noisy. Users who need
debug output can still set LOG_LEVEL=debug in their compose.yml.

Closes #285

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: 2 people

install/management_compose.yaml

@@ -18,7 +18,7 @@ services:
     environment:
       - NODE_ENV=production
       - PORT=8080
-      - LOG_LEVEL=debug
+      - LOG_LEVEL=info
       - APP_KEY=replaceme
       - HOST=0.0.0.0
       - URL=replaceme