Prepare the repository for a public release

- docs/deployment.md: step-by-step Docker deployment for anyone (setup,
  configuration, LAN/HTTPS/VPN access, adding manga, operation, prebuilt
  images, backups, peering, troubleshooting, rules for agents).
- deploy/circus.sh: host helper without Node (status, up/down with queue
  pause, logs, pause/resume, update, rescan, restore-test); deploy/compose.https.yml
  + Caddyfile for automatic HTTPS.
- README rewritten for public readers (Docker first, sources/copyright note,
  docs index); AGENTS.md + CLAUDE.md for contributors and coding agents.
- Removed notes about one particular installation (Windows host, handoffs,
  audits of a private library, benchmarks with local paths, wishlist, reading
  map) and the unused ops/proxmox templates; generalized remaining mentions of
  hosts, VPN and Windows-only commands.
- Defaults: TZ and reading time zone UTC; .gitattributes keeps shell/YAML LF.
- Personal agent coordination files are git-ignored (CLAUDE.local.md,
  .claude/skills/manga-org/).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.env.example

@@ -11,13 +11,18 @@ SCRAPER_TOKEN_PATH=./.secrets/scraper_token
 # Built-in backups of DATA_PATH (docs/backup.md): an existing folder, ideally on another
 # disk/NAS, writable by uid 1000. Unset = backups off (./backup is then mounted unused).
 # BACKUP_PATH=./backup
-TZ=Europe/Berlin
+TZ=UTC
 COOKIE_SECURE=0
 # Optional server-enforced reading windows. Day keys: 0=Sunday through 6=Saturday.
 # Ranges may cross midnight. Multiple ranges per day are supported.
 # READING_WINDOWS_JSON='{"0":[["08:00","01:00"]],"1":[["07:00","24:00"]],"2":[["07:00","24:00"]],"3":[["07:00","24:00"]],"4":[["07:00","24:00"]],"5":[["07:00","24:00"]],"6":[["08:00","01:00"]]}'
-READING_TIMEZONE=Europe/Berlin
+READING_TIMEZONE=UTC
 READING_QUIZ_UNLOCK_MINUTES=60
 # Optional deployment-managed JSON file under DATA_PATH, e.g. /data/reading-quiz.json.
 # READING_QUIZ_CATALOG_PATH=/data/reading-quiz.json
 PROXY_NETWORK=mangacircus-edge
+# Extra Compose files, ':'-separated (docs/deployment.md), e.g. HTTPS with the bundled Caddy:
+# COMPOSE_FILE=docker-compose.yml:deploy/compose.https.yml
+# MANGACIRCUS_DOMAIN=manga.example.org
+# PEER_DATA_PATH=./data/peering
+# PEER_USAGE_PATH=./data/peering-usage