Add self-contained Docker Compose stacks for pivoine.art infrastructure

Migrated 11 services from monolithic docker-compose project into independent stacks,
each with dedicated databases, minimal .env configuration, and bind-mount data volumes.

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

vaultwarden/compose.yml

@@ -0,0 +1,38 @@
+---
+services:
+  vaultwarden:
+    image: vaultwarden/server:latest
+    container_name: vaultwarden
+    environment:
+      TZ: ${TIMEZONE:-Europe/Amsterdam}
+      DOMAIN: https://${TRAEFIK_HOST}
+      WEBSOCKET_ENABLED: "true"
+      SIGNUPS_ALLOWED: "true"
+      INVITATIONS_ALLOWED: "true"
+      SHOW_PASSWORD_HINT: "false"
+      SMTP_HOST: mailpit
+      SMTP_FROM_NAME: Vaultwarden
+      SMTP_SECURITY: off
+      SMTP_PORT: 1025
+    volumes:
+      - ../.data/vaultwarden:/data
+    restart: always
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.middlewares.vaultwarden-redirect-web-secure.redirectscheme.scheme=https"
+      - "traefik.http.routers.vaultwarden-web.middlewares=vaultwarden-redirect-web-secure"
+      - "traefik.http.routers.vaultwarden-web.rule=Host(`${TRAEFIK_HOST}`)"
+      - "traefik.http.routers.vaultwarden-web.entrypoints=web"
+      - "traefik.http.routers.vaultwarden-web-secure.rule=Host(`${TRAEFIK_HOST}`)"
+      - "traefik.http.routers.vaultwarden-web-secure.tls.certresolver=resolver"
+      - "traefik.http.routers.vaultwarden-web-secure.entrypoints=web-secure"
+      - "traefik.http.routers.vaultwarden-web-secure.middlewares=security-headers@file"
+      - "traefik.http.services.vaultwarden-web-secure.loadbalancer.server.port=80"
+      - "traefik.docker.network=${NETWORK_NAME}"
+      - "com.centurylinklabs.watchtower.enable=true"
+    networks:
+      - compose_network
+networks:
+  compose_network:
+    name: ${NETWORK_NAME}
+    external: true