How to add the robots.txt file to an AEM server to provide rules for Web Crawlers in AEM?

This is my first AEM project, I have a image upload in a component which is working, after uploading if i open settings of component to change the image, preview is not working as you can see in be...

When we update any configuration for a component in the Configurations tab in the Apache Felix Web OSGi Console, where are these configuration settings saved? This is with respect to AEM 6.0 or abo...