App Store Connect API Key Path Confusion

[jhanstra]

I'm following these steps to understand how to submit my app to the app store: fyi/creating-asc-api-key.md. I know that my submit.production.ios object in my eas.json needs three properties:

"ascApiKeyPath": "",
"ascApiKeyIssuerId": "xxxxxxxxxxxxxx",
"ascApiKeyId": "xxxxxxx",

The guide is clear about how to get the ascApiKeyId and ascApiKeyIssuerId - thank you. But I am confused how to get the ascApiKeyPath. The guide doesn't say anything about it. I'm assuming I don't just provide the raw .p8 file in my repo and then give the path to it in the eas.json, as that would be a security concern? But I can't find any documentation on what goes in that field. Thank you in advance!