Fix typos in getting started docs
Permissions for /etc/default/app_name changed to 644
fix rpm tests with new /etc/default permissions
Merge pull request #354 from kardapoltsev/wip/fix-permissions

Permissions for /etc/default/app_name changed to 644
Merge pull request #351 from ArtemPyanykh/docs-typos-fix

Fix typos in getting started docs.