chore: add deployer config for staging environment

deploy.php

@@ -80,6 +80,20 @@ host('prod')
     ->set('cachetool_args', '--web=SymfonyHttpClient --web-path={{release_or_current_path}}/public/ --web-url=https://myep-team.ep-reisen.de')
 ;
 
+host('staging')
+    ->setHostname('185.243.132.170')
+    ->setRemoteUser('p546473')
+    ->setForwardAgent(true)
+    ->setSshMultiplexing(true)
+    ->setDeployPath('/home/www/p546473/html/myep-team')
+    ->set('writable_mode', 'chmod')
+    ->set('bin/php', '/usr/local/bin/php')
+    ->set('rsync_src', __DIR__)
+    ->set('rsync', $rsyncOptions)
+    ->set('keep_releases', 5)
+    ->set('cachetool_args', '--web=SymfonyHttpClient --web-path={{release_or_current_path}}/public/ --web-url=https://myep-team.dreipunktnull.net')
+;
+
 task('deploy', [
     'deploy:info',
     'deploy:setup',