feat: add initial Portainer stack and template configurations for AdGuard Home

templates/adguard/README.md

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+# AdGuard Home (Portainer template)
+
+AdGuard Home is a network-wide software for blocking ads, trackers and unwanted content by acting as a DNS resolver with filtering capabilities. This template contains a ready-to-use configuration to deploy AdGuard Home as a Docker stack via Portainer.
+
+Quick notes:
+
+- Expose the DNS ports (`53/tcp` and `53/udp`) so your network devices can use AdGuard as a resolver.
+- Mount a persistent directory for configuration and DNS databases to preserve settings across container restarts.
+- Keep secrets (if any) out of this repository—use environment variables, Docker secrets, or Portainer credentials.
+
+Usage:
+
+1. Import the compose file or template into Portainer's Stacks/App Templates.
+2. Adjust the bind paths and ports to match your host and network.
+3. Deploy and point your devices or DHCP server to the AdGuard DNS address.
+
+Helpful links:
+
+- Official site: https://adguard.com/en/adguard-home/overview.html
+- Docs: https://github.com/AdguardTeam/AdGuardHome

templates/adguard/docker-compose.yml

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+services:
+  adguard:
+    image: adguard/adguardhome
+    container_name: AdGuard
+    mem_limit: 2g
+    cpu_shares: 768
+    security_opt:
+      - no-new-privileges:true
+    network_mode: host
+    volumes:
+      - /volume1/docker/adguard/config:/opt/adguardhome/conf:rw
+      - /volume1/docker/adguard/data:/opt/adguardhome/work:rw
+    environment:
+      TZ: Europe/Dublin
+    restart: always