Add Hub update script and document hardening changes

Co-Authored-By: Oz <oz-agent@warp.dev>

docker-compose.yml

@@ -26,6 +26,14 @@ services:
     image: nextcloud:29-apache
     container_name: nextcloud-app
     restart: unless-stopped
+    command:
+      - /bin/sh
+      - -c
+      - |
+        mkdir -p /var/cache/fontconfig
+        chown -R www-data:www-data /var/cache/fontconfig
+        printf "ServerName nxt.bhatfamily.in\n" > /etc/apache2/conf-enabled/servername.conf
+        exec apache2-foreground
     env_file:
       - .env
     environment:
@@ -38,6 +46,7 @@ services:
       - NEXTCLOUD_TRUSTED_DOMAINS=nxt.bhatfamily.in
       - NEXTCLOUD_OVERWRITEHOST=nxt.bhatfamily.in:8446
       - NEXTCLOUD_OVERWRITEPROTOCOL=https
+      - XDG_CACHE_HOME=/tmp/.cache
     depends_on:
       - db
     volumes: