feat: Centralize Nextcloud hostname configuration

Introduces a YAML anchor to define the Nextcloud host once, improving consistency.
Applies the hostname anchor to ingress, probes, and Nextcloud's host setting.
Adds `overwritehost` and `overwrite.cli.url` to Nextcloud's `config.php` for correct URL generation when behind a reverse proxy.

prototypes/nextcloud/helm/nextcloud.yaml

@@ -1,4 +1,6 @@
 ---
+_hostname: &hostname nextcloud.tr1ceracop.de
+
 replicaCount: 1
 
 image:
@@ -8,7 +10,7 @@ nginx:
   enabled: false
 
 nextcloud:
-  host: nextcloud.tr1ceracop.de
+  host: *hostname
 
   existingSecret:
     enabled: true
@@ -36,6 +38,8 @@ nextcloud:
       $CONFIG = array(
         'trusted_proxies' => ['10.0.0.0/8'],
         'overwriteprotocol' => 'https',
+        'overwritehost' => 'nextcloud.tr1ceracop.de',
+        'overwrite.cli.url' => 'https://nextcloud.tr1ceracop.de',
         'default_phone_region' => 'DE',
       );
 
@@ -99,7 +103,7 @@ nextcloud:
           port: 80
           httpHeaders:
             - name: Host
-              value: nextcloud.tr1ceracop.de
+              value: *hostname
         initialDelaySeconds: 30
         periodSeconds: 15
         timeoutSeconds: 5
@@ -109,7 +113,7 @@ nextcloud:
           port: 80
           httpHeaders:
             - name: Host
-              value: nextcloud.tr1ceracop.de
+              value: *hostname
         initialDelaySeconds: 30
         periodSeconds: 15
         timeoutSeconds: 5
@@ -171,7 +175,7 @@ ingress:
   tls:
     - secretName: nextcloud-tls
       hosts:
-        - nextcloud.tr1ceracop.de
+        - *hostname
 
 resources:
   requests:

rendered/envs/production/nextcloud/configmap-nextcloud-config.yaml

@@ -93,6 +93,8 @@ data:
     $CONFIG = array(
       'trusted_proxies' => ['10.0.0.0/8'],
       'overwriteprotocol' => 'https',
+      'overwritehost' => 'nextcloud.tr1ceracop.de',
+      'overwrite.cli.url' => 'https://nextcloud.tr1ceracop.de',
       'default_phone_region' => 'DE',
     );
   redis.config.php: |-

rendered/envs/production/nextcloud/deployment-nextcloud.yaml

@@ -28,7 +28,7 @@ spec:
     metadata:
       annotations:
         hooks-hash: 47a89ca9deff73131884ece615e1cabb1f600fec60aa8f20244ae3c5bb58f948
-        nextcloud-config-hash: 0d229123637fe9f641f41261891a44b761ff32c52f973314650897e768f3456d
+        nextcloud-config-hash: ec89ea6d9676ed525984771aab8f4536c9f4f62736b2c9898e883f5d0a7f90f8
         php-config-hash: b638f66fd8d65de8364dbad6efc59a6524c7b2e2377b5623cf5e921e4d3d2400
       labels:
         app.kubernetes.io/component: app