Feature request

Feature description

The generated and installed config files permission are too open, any user logined on the system can read and write them. So i suggest append a chmod command into Extract tar step to keep config files more safty.

How the feature is useful

like:

tar -xzvf nginxconfig.io-example.com.tar.gz | xargs chmod 0644

the tar xzvf command will return which files it extracted, and then we can use xargs to convert them as arguments to chmod command.