feat: add community container nextcloud-exporter

- allows monitoring your nextcloud with prometheus
- listens on localhost only, but caddy integration is available
- You can create a Dashboard in Grafana to visualize the collected data

Signed-off-by: Benjamin Brahmer <info@b-brahmer.de>
Co-Authored-By: Simon L. <szaimen@e.mail.de>

community-containers/caddy/caddy.json

@@ -23,7 +23,8 @@
             "environment": [
                 "TZ=%TIMEZONE%",
                 "NC_DOMAIN=%NC_DOMAIN%",
-                "APACHE_PORT=%APACHE_PORT%"
+                "APACHE_PORT=%APACHE_PORT%",
+                "NEXTCLOUD_EXPORTER_CADDY_PASSWORD=%NEXTCLOUD_EXPORTER_CADDY_PASSWORD%"
             ],
             "volumes": [
                 {
@@ -37,6 +38,9 @@
                     "writeable": false
                 }
             ],
+            "secrets": [
+                "NEXTCLOUD_EXPORTER_CADDY_PASSWORD"
+            ],
             "aio_variables": [
                 "apache_ip_binding=@INTERNAL",
                 "apache_port=11000"

community-containers/caddy/readme.md

@@ -1,5 +1,5 @@
 ## Caddy with geoblocking
-This container bundles caddy and auto-configures it for you. It also covers [vaultwarden](https://github.com/nextcloud/all-in-one/tree/main/community-containers/vaultwarden) by listening on `bw.$NC_DOMAIN`, if installed. It also covers [stalwart](https://github.com/nextcloud/all-in-one/tree/main/community-containers/stalwart) by listening on `mail.$NC_DOMAIN`, if installed. It also covers [jellyfin](https://github.com/nextcloud/all-in-one/tree/main/community-containers/jellyfin) by listening on `media.$NC_DOMAIN`, if installed. It also covers [lldap](https://github.com/nextcloud/all-in-one/tree/main/community-containers/lldap) by listening on `ldap.$NC_DOMAIN`, if installed. It also covers [nocodb](https://github.com/nextcloud/all-in-one/tree/main/community-containers/nocodb) by listening on `tables.$NC_DOMAIN`, if installed. It also covers [jellyseerr](https://github.com/nextcloud/all-in-one/tree/main/community-containers/jellyseerr) by listening on `requests.$NC_DOMAIN`, if installed.
+This container bundles caddy and auto-configures it for you. It also covers [vaultwarden](https://github.com/nextcloud/all-in-one/tree/main/community-containers/vaultwarden) by listening on `bw.$NC_DOMAIN`, if installed. It also covers [stalwart](https://github.com/nextcloud/all-in-one/tree/main/community-containers/stalwart) by listening on `mail.$NC_DOMAIN`, if installed. It also covers [jellyfin](https://github.com/nextcloud/all-in-one/tree/main/community-containers/jellyfin) by listening on `media.$NC_DOMAIN`, if installed. It also covers [lldap](https://github.com/nextcloud/all-in-one/tree/main/community-containers/lldap) by listening on `ldap.$NC_DOMAIN`, if installed. It also covers [nocodb](https://github.com/nextcloud/all-in-one/tree/main/community-containers/nocodb) by listening on `tables.$NC_DOMAIN`, if installed. It also covers [jellyseerr](https://github.com/nextcloud/all-in-one/tree/main/community-containers/jellyseerr) by listening on `requests.$NC_DOMAIN`, if installed. It also covers [nextcloud-exporter](https://github.com/nextcloud/all-in-one/tree/main/community-containers/nextcloud-exporter) by listening on `metrics.$NC_DOMAIN`, if installed.
 
 ### Notes
 - This container is incompatible with the [npmplus](https://github.com/nextcloud/all-in-one/tree/main/community-containers/npmplus) community container. So make sure that you do not enable both at the same time!
@@ -10,6 +10,7 @@ This container bundles caddy and auto-configures it for you. It also covers [vau
 - If you want to use this with [lldap](https://github.com/nextcloud/all-in-one/tree/main/community-containers/lldap), make sure that you point `ldap.your-nc-domain.com` to your server using a cname record so that caddy can get a certificate automatically for lldap.
 - If you want to use this with [nocodb](https://github.com/nextcloud/all-in-one/tree/main/community-containers/nocodb), make sure that you point `tables.your-nc-domain.com` to your server using a cname record so that caddy can get a certificate automatically for nocodb.
 - If you want to use this with [jellyseerr](https://github.com/nextcloud/all-in-one/tree/main/community-containers/jellyseerr), make sure that you point `requests.your-nc-domain.com` to your server using a cname record so that caddy can get a certificate automatically for jellyseerr.
+- If you want to use this with [nextcloud-exporter](https://github.com/nextcloud/all-in-one/tree/main/community-containers/nextcloud-exporter), make sure that you point `metrics.your-nc-domain.com` to your server using a cname record so that caddy can get a certificate automatically for nextcloud-exporter.
 - After the container was started the first time, you should see a new `nextcloud-aio-caddy` folder and inside there an `allowed-countries.txt` file when you open the files app with the default `admin` user. In there you can adjust the allowed country codes for caddy by adding them to the first line, e.g. `IT FR` would allow access from italy and france. Private ip-ranges are always allowed. Additionally, in order to activate this config, you need to get an account at https://dev.maxmind.com/geoip/geolite2-free-geolocation-data and download the `GeoLite2-Country.mmdb` and upload it with this exact name into the `nextcloud-aio-caddy` folder. Afterwards restart all containers from the AIO interface and your new config should be active!
 - You can add your own Caddy configurations in `/data/caddy-imports/` inside the Caddy container (`sudo docker exec -it nextcloud-aio-caddy bash`). These will be imported on container startup. **Please note:** If you do not have CLI access to the server, you can now run docker commands via a web session by using this community container: https://github.com/nextcloud/all-in-one/tree/main/community-containers/container-management
 - See https://github.com/nextcloud/all-in-one/tree/main/community-containers#community-containers how to add it to the AIO stack