Refine .ssh directory permissions (#4113)

Author: MarcoRemy

recipe/provision/user.php

@@ -44,7 +44,9 @@
  try {
  run('chown -R deployer:deployer /home/deployer');
  run('chmod -R 755 /home/deployer');
- run('chmod 700 /home/deployer/.ssh/id_ed25519');
+ run('chmod 700 /home/deployer/.ssh');
+ run('chmod 600 /home/deployer/.ssh/id_ed25519');
+ run('chmod 600 /home/deployer/.ssh/authorized_keys');
  } catch (\Throwable $e) {
  warning($e->getMessage());
  }