fix: detect existing Nextcloud/WordPress installs and add dedicated php-fpm pools

Agent-Logs-Url: https://github.com/naturallaw777/staging_alpha/sessions/6d5b7710-ee06-40ff-8975-f8edca8b879f

Co-authored-by: naturallaw777 <99053422+naturallaw777@users.noreply.github.com>

modules/core/caddy.nix

@@ -110,7 +110,7 @@ EOF
 $WORDPRESS {
   encode gzip zstd
   root * /var/lib/www/wordpress
-  php_fastcgi unix//run/phpfpm/mypool.sock
+  php_fastcgi unix//run/phpfpm/wordpress.sock
   file_server browse
 }
 EOF
@@ -123,7 +123,7 @@ EOF
 $NEXTCLOUD {
   encode gzip zstd
   root * /var/lib/www/nextcloud
-  php_fastcgi unix//run/phpfpm/mypool.sock {
+  php_fastcgi unix//run/phpfpm/nextcloud.sock {
     trusted_proxies private_ranges
   }
   file_server
@@ -221,4 +221,4 @@ ${extraVhosts}
 CUSTOM_VHOSTS_EOF
     '';
   };
-}
+}