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NilsBriggen 0892b8f19c Backend security hardening for a small public server
Audit-driven; goal: one user can't exhaust the box or starve the shared Traefik stack.

Resource containment:
- compose: mem_limit 512m, memswap_limit, pids_limit 200, cpus 1.0 (blast radius = container)
- Enforce per-user cloud quota (default 30MB, admin override) on /api/save + /api/characters → 413
- Cap published-character size (2MB); cap rooms (200), images/room (40), image bytes/room (40MB)
- Cap WS image dataUrl length in the wire schema; per-IP WS connection cap (20)
- MAX_USERS registration ceiling → 503 when full

Availability + correctness:
- Async crypto.scrypt (was scryptSync) so password hashing can't freeze the event loop;
  constant-time on unknown users to avoid username probing
- trustProxy so req.ip is the real client behind Traefik — rate limits are per-IP, not global
- Tighter auth-endpoint bucket (10/min) on /register + /login; prune stale rate buckets
- O(1) token->user index; log persist() failures instead of swallowing them
- Trim /healthz info; surface quota in /api/usage + the admin dashboard storage bar
- Client surfaces 413 (quota) / 429 (rate) clearly

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
2026-06-10 20:37:14 +02:00

49 lines
1.6 KiB
YAML

# Self-contained compose project for ttrpg.briggen.dev.
# Deploy: rsync the repo to /root/briggen-dev/ttrpg/, place this file there as
# docker-compose.yml, then `docker compose up -d --build`.
# Joins the EXISTING external `proxy` network — the shared Traefik stack is untouched.
name: ttrpg
services:
ttrpg:
build: .
container_name: ttrpg
restart: unless-stopped
environment:
- PORT=8787
- STATIC_DIR=/app/dist
- NODE_ENV=production
- DATA_DIR=/data
- ALLOWED_ORIGINS=https://ttrpg.briggen.dev
# comma-separated usernames that can see the admin panel (set to your account)
- ADMIN_USERS=nilsb
# default per-user cloud storage cap (bytes); admins override per user in the dashboard
- DEFAULT_QUOTA_BYTES=31457280 # 30 MB
# hard ceiling on accounts so open registration can't fill the disk
- MAX_USERS=500
volumes:
- ttrpg-data:/data
security_opt:
- no-new-privileges:true
# Hard caps so a runaway session can't starve the host or the shared Traefik
# stack — the blast radius stays this container, then `restart: unless-stopped`.
mem_limit: 512m
memswap_limit: 512m
pids_limit: 200
cpus: 1.0
labels:
- "traefik.enable=true"
- "traefik.http.routers.ttrpg.rule=Host(`ttrpg.briggen.dev`)"
- "traefik.http.routers.ttrpg.entrypoints=websecure"
- "traefik.http.routers.ttrpg.tls.certresolver=letsencrypt"
- "traefik.http.services.ttrpg.loadbalancer.server.port=8787"
networks:
- proxy
volumes:
ttrpg-data:
networks:
proxy:
external: true