"index.oam" is created after publishing the Edge project to the local directory.
What is index.oam for?
Do I need to upload index.oam too, when I upload the published files to my web site?
OAM files are what we output on publish for other Adobe products such as Dreamweaver and InDesign. Instead of publishing the Animate Deployment Package, you can publish for Web and put the contents of the publish/web/ directory up on your webserver.
(You can change this by going to File > Publish Settings...)
Thank you for the advice and your kindness.