Add pihole compose file

pihole/compose.yml

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+# More info at https://github.com/pi-hole/docker-pi-hole/ and https://docs.pi-hole.net/
+services:
+  pihole:
+    container_name: pihole
+    image: pihole/pihole:latest
+    # For DHCP it is recommended to remove these ports and instead add: network_mode: "host"
+    ports:
+      - "53:53/tcp"
+      - "53:53/udp"
+      - "67:67/udp"
+      - "80:80/tcp"
+    environment:
+      TZ: 'Europe/Berlin'
+      WEBPASSWORD: '***REMOVED***'
+      PIHOLE_DNS_: 1.1.1.1;1.0.0.1
+      INTERFACE: 'eth0'
+    # Volumes store your data between container upgrades
+    volumes:
+      - './etc-pihole:/etc/pihole'
+      - './etc-dnsmasq.d:/etc/dnsmasq.d'
+    #   https://github.com/pi-hole/docker-pi-hole#note-on-capabilities
+    cap_add:
+      - NET_ADMIN
+    restart: unless-stopped