Upload files apart from project github repository

Is there a way to upload files to my account without adding them to the project github repository? I’d like to use a keystore file to sign my Android apk and I wouldn’t want to add the file to the project as well.

How big is the file? If it’s on the small size (less than a MB) you can probably base64 encode it and store it as an environment variable. We don’t have a guide on that specifically but it’s the same process as you would use to store Google Cloud creds.