Add Pi-hole with AdGuard DOH/DOT integration, reorganize swarm stacks, add DNS/n8n docs

services/swarm/stacks/productivity/productivity-stack.yml

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+version: '3.9'
+
+networks:
+  traefik-public:
+    external: true
+  productivity-backend:
+    driver: overlay
+
+volumes:
+  nextcloud_data:
+  nextcloud_db:
+  nextcloud_redis:
+
+services:
+  nextcloud-db:
+    image: postgres:15-alpine
+    volumes:
+      - nextcloud_db:/var/lib/postgresql/data
+    environment:
+      - POSTGRES_DB=nextcloud
+      - POSTGRES_USER=nextcloud
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD} # Replace with a secure password in production
+    networks:
+      - productivity-backend
+    deploy:
+      placement:
+        constraints:
+          - node.labels.leader == true
+      resources:
+        limits:
+          memory: 1G
+          cpus: '1.0'
+        reservations:
+          memory: 256M
+          cpus: '0.25'
+      restart_policy:
+        condition: on-failure
+
+  nextcloud-redis:
+    image: redis:7-alpine
+    volumes:
+      - nextcloud_redis:/data
+    networks:
+      - productivity-backend
+    deploy:
+      placement:
+        constraints:
+          - node.labels.leader == true
+      resources:
+        limits:
+          memory: 256M
+          cpus: '0.5'
+        reservations:
+          memory: 64M
+          cpus: '0.1'
+      restart_policy:
+        condition: on-failure
+
+  nextcloud:
+    image: nextcloud:latest
+    volumes:
+      - nextcloud_data:/var/www/html
+    environment:
+      - POSTGRES_HOST=nextcloud-db
+      - POSTGRES_DB=nextcloud
+      - POSTGRES_USER=nextcloud
+      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD} # Replace with a secure password in production
+      - REDIS_HOST=nextcloud-redis
+      - NEXTCLOUD_ADMIN_USER=${NEXTCLOUD_ADMIN_USER} # Replace with your desired admin username
+      - NEXTCLOUD_ADMIN_PASSWORD=${NEXTCLOUD_ADMIN_PASSWORD} # Replace with a secure password
+      - NEXTCLOUD_TRUSTED_DOMAINS=nextcloud.sterl.xyz
+      - OVERWRITEPROTOCOL=https
+      - OVERWRITEHOST=nextcloud.sterl.xyz
+      - TRUSTED_PROXIES=172.16.0.0/12
+    depends_on:
+      - nextcloud-db
+      - nextcloud-redis
+    networks:
+      - traefik-public
+      - productivity-backend
+    deploy:
+      placement:
+        constraints:
+          - node.labels.leader == true
+      resources:
+        limits:
+          memory: 2G
+        reservations:
+          memory: 512M
+      restart_policy:
+        condition: on-failure
+      labels:
+        - "traefik.enable=true"
+        - "traefik.http.routers.nextcloud.rule=Host(`nextcloud.sterl.xyz`)"
+        - "traefik.http.routers.nextcloud.entrypoints=websecure"
+        - "traefik.http.routers.nextcloud.tls.certresolver=cfresolver"
+        - "traefik.http.services.nextcloud.loadbalancer.server.port=80"
+        - "traefik.swarm.network=traefik-public"
+        # Nextcloud-specific middlewares
+        - "traefik.http.routers.nextcloud.middlewares=nextcloud-chain"
+        - "traefik.http.middlewares.nextcloud-chain.chain.middlewares=nextcloud-caldav,nextcloud-headers"
+        # CalDAV/CardDAV redirect
+        - "traefik.http.middlewares.nextcloud-caldav.redirectregex.regex=^https://(.*)/.well-known/(card|cal)dav"
+        - "traefik.http.middlewares.nextcloud-caldav.redirectregex.replacement=https://$$1/remote.php/dav/"
+        - "traefik.http.middlewares.nextcloud-caldav.redirectregex.permanent=true"
+        # Security headers
+        - "traefik.http.middlewares.nextcloud-headers.headers.stsSeconds=31536000"
+        - "traefik.http.middlewares.nextcloud-headers.headers.stsIncludeSubdomains=true"
+        - "traefik.http.middlewares.nextcloud-headers.headers.stsPreload=true"
+        - "traefik.http.middlewares.nextcloud-headers.headers.forceSTSHeader=true"
+        - "traefik.http.middlewares.nextcloud-headers.headers.customFrameOptionsValue=SAMEORIGIN"
+        - "traefik.http.middlewares.nextcloud-headers.headers.customResponseHeaders.X-Robots-Tag=noindex,nofollow"
+        - "tsdproxy.enable=true"
+        - "tsdproxy.name=nextcloud"
+        - "tsdproxy.container_port=80"