community-containers - add pi-hole

Signed-off-by: Simon L <szaimen@e.mail.de>

community-containers/pi-hole/pi-hole.json

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+{
+    "aio_services_v1": [
+        {
+            "container_name": "nextcloud-aio-pihole",
+            "display_name": "Pi-hole",
+            "image": "pihole/pihole",
+            "image_tag": "latest",
+            "internal_port": "8573",
+            "restart": "unless-stopped",
+            "ports": [
+                {
+                  "ip_binding": "",
+                  "port_number": "53",
+                  "protocol": "tcp"
+                },
+                {
+                    "ip_binding": "",
+                    "port_number": "53",
+                    "protocol": "udp"
+                },
+                {
+                    "ip_binding": "",
+                    "port_number": "8573",
+                    "protocol": "tcp"
+                }
+            ],
+            "environment": [
+                "TZ=%TIMEZONE%",
+                "WEBPASSWORD=%PIHOLE_WEBPASSWORD%",
+                "DNSMASQ_LISTENING=all",
+                "WEB_PORT=8573"
+            ],
+            "volumes": [
+                {
+                    "source": "nextcloud_aio_pihole",
+                    "destination": "/etc/pihole",
+                    "writeable": true
+                },
+                {
+                    "source": "nextcloud_aio_pihole_dnsmasq",
+                    "destination": "/etc/dnsmasq.d",
+                    "writeable": true
+                }
+            ],
+            "backup_volumes": [
+                "nextcloud_aio_pihole",
+                "nextcloud_aio_pihole_dnsmasq"
+            ],
+            "secrets": [
+                "PIHOLE_WEBPASSWORD"
+            ]
+        }
+    ]
+}

community-containers/pi-hole/readme.md

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+## Pi-hole
+This container bundles pi-hole and auto-configures it for you.
+
+### Notes
+- You should not run this container on a public VPS! It is only intended to run in home networks!
+- Make sure that no dns server is already running by checking with `sudo netstat -tulpn | grep 53`. Otherwise the container will not be able to start!
+- The DHCP functionality of Pi-hole has been disabled!
+- The data of pi-hole will be automatically included in AIOs backup solution!
+- After adding and starting the container, you can visit `http://ip.address.of.this.server:8573` in order to log in with the admin key that you can retrieve when running `sudo docker inspect nextcloud-aio-pihole | grep WEBPASSWORD`. There you can configure the pi-hole setup. Also you can add local dns records.
+- You can configure your home network now to use pi-hole as its dns server by configuring your router.
+- Additionally, you can configure the docker daemon to use that by editing `/etc/docker/daemon.json` and adding ` { "dns" : [ "ip.address.of.this.server" , "8.8.8.8" ] } `.
+- See https://github.com/nextcloud/all-in-one/tree/main/community-containers how to add it to the AIO stack
+
+### Repository
+https://github.com/pi-hole/docker-pi-hole
+
+### Maintainer
+https://github.com/szaimen