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>

umami/compose.yml

@@ -0,0 +1,55 @@
+---
+services:
+  umami:
+    image: ghcr.io/umami-software/umami:latest
+    container_name: umami
+    environment:
+      TZ: ${TIMEZONE:-Europe/Amsterdam}
+      DATABASE_URL: postgresql://umami:umami@db:5432/umami
+      APP_SECRET: ${APP_SECRET}
+    depends_on:
+      db:
+        condition: service_healthy
+    init: true
+    restart: always
+    healthcheck:
+      test: ["CMD-SHELL", "curl http://localhost:3000/api/heartbeat"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    labels:
+      - "traefik.enable=true"
+      - "traefik.http.middlewares.umami-redirect-web-secure.redirectscheme.scheme=https"
+      - "traefik.http.routers.umami-web.middlewares=umami-redirect-web-secure"
+      - "traefik.http.routers.umami-web.rule=Host(`${TRAEFIK_HOST}`)"
+      - "traefik.http.routers.umami-web.entrypoints=web"
+      - "traefik.http.routers.umami-web-secure.rule=Host(`${TRAEFIK_HOST}`)"
+      - "traefik.http.routers.umami-web-secure.tls.certresolver=resolver"
+      - "traefik.http.routers.umami-web-secure.entrypoints=web-secure"
+      - "traefik.http.routers.umami-web-secure.middlewares=security-headers@file"
+      - "traefik.http.services.umami-web-secure.loadbalancer.server.port=3000"
+      - "traefik.docker.network=${NETWORK_NAME}"
+      - "com.centurylinklabs.watchtower.enable=true"
+    networks:
+      - compose_network
+  db:
+    image: postgres:15-alpine
+    container_name: umami_db
+    environment:
+      POSTGRES_DB: umami
+      POSTGRES_USER: umami
+      POSTGRES_PASSWORD: umami
+    volumes:
+      - ../.data/umami/db:/var/lib/postgresql/data
+    restart: always
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $${POSTGRES_USER} -d $${POSTGRES_DB}"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+    networks:
+      - compose_network
+networks:
+  compose_network:
+    name: ${NETWORK_NAME}
+    external: true