Well, as I saw some asgard developers sometimes visit forum, it is possible that they will see that topic also. Don't know other options to make it happend.)
And once again thank you so much for your help.

@kay899 Yes, it worked!!! Thank you!
Maybe this answer of yours should be added to documentation somehow, it would help other people also.

No, I didn't published anything.
How to make it?

Hello.
I've created new module, and wanted to add two settings for it.
According to instruction:
Adding settings for you module is very easy. All you need to do is add a settings.php configuration file in YourModule/config/settings.php, and return an array of settings you want.

So i added this file with content

return [
'manager-email' => [
'description' => 'Manager email',
'view' => 'text',
'default' => '',
],
'admin-email' => [
'description' => 'Admin email',
'view' => 'text',
'default' => '',
],
];

This added fields are not appearing in Settings of backend. As i see it was created with that intention, you just should add fields and you can set them in backend and use in all the application.
What am I missing?

Oh, i c.
Looks like my vision worsened, i saw = as - from documentaion.
Thank you.

after running in console:
composer create-project asgardcms/platform-2.0.x-dev project-folder

getting error:

[InvalidArgumentException]
Could not find package asgardcms/platform-2.0.x-dev with stability stable.

Tried to install asgard 1.0, it goes fine.

@armababy Thank you!

@armababy Thank you so much! It works perfectly.

Step 3 in docs is trigger event on create/update.
This is the place where newbies like me stuck.

Re: Unable to upload/save image

Looks like a lot of people meet the same problem as i met. Need more explanation about linking media to entity.
In previous topic Bob giving good solution which works, but it's not the solution provided in docs.