Fix variable substitution in users_database.yml

- Update localize_users_database_file to properly resolve nested variables in AUTHELIA_ADMIN_EMAIL
- Fix template to use correct AUTHELIA_* variables instead of DEFAULT_* variables
- Update deploy-core.sh to only process files containing variables and fix .env path
- Fix file permissions for authelia config files

docker-compose/core/duckdns/config/logrotate.conf

@@ -0,0 +1,5 @@
+/config/duck.log {
+    rotate 5
+    size 100k
+    compress
+}