docker-compose.secure.yml

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# Hardened overlay - requires Docker Compose v2+
# Usage: docker compose -f docker-compose.yml -f docker-compose.secure.yml up -d
#
# This overlay adds:
#   - read-only root filesystem with /tmp on tmpfs
#   - no-new-privileges security option
#   - tighter resource caps
#   - required env-var enforcement (ADMIN_PASSWORD, COOKIE_SECURE)
#
# Prerequisites:
#   - Set ADMIN_PASSWORD to a strong value (min 12 chars)
#   - Set SESSION_SECRET, API_KEY, WEBHOOK_SECRET to 32+ char random strings
#   - Place the app behind an HTTPS reverse proxy and set COOKIE_SECURE=true

services:
  plekt:
    read_only: true
    tmpfs:
      - /tmp:size=64m,mode=1777
    security_opt:
      - no-new-privileges:true
    environment:
      - COOKIE_SECURE=true
      - PLEKT_PUBLISHED_PORT=5056
      # Required - must be set to a strong password before first boot.
      - ADMIN_PASSWORD=${ADMIN_PASSWORD:?ADMIN_PASSWORD must be set}
      # Required - pin secrets so they survive container replacement.
      - SESSION_SECRET=${SESSION_SECRET:?SESSION_SECRET must be set}
      - API_KEY=${API_KEY:?API_KEY must be set}
      - WEBHOOK_SECRET=${WEBHOOK_SECRET:?WEBHOOK_SECRET must be set}
    deploy:
      resources:
        limits:
          cpus: "1.0"
          memory: "512M"