Apple-app-site-associate file not accessible

I work on develop iOS app, and I need to use DeepLinks in my app. It must add apple-app-site-associate json file to my host in root directory without extension, I add it but when I checked it on https://app-site-association.cdn-apple.com/a/v1/zibox.io it show not found. I think it must edit some configurations on Nginx server to recognize that json file without extension.