deploy from github is currently unavailable due to some hacker attack

reference: https://status.heroku.com/incidents/2413

We are dedicated to ensuring the security of our customers, and as such, continue to pursue all potential leads as part of our investigation. As part of that commitment, we want to let you know about two additional findings that may impact a small number of our customers.

As reported on status.heroku.com, on April 7, 2022, a threat actor obtained access to a Heroku database and downloaded stored customer GitHub integration OAuth tokens. On that same day, the threat actor downloaded data from another database that stores pipeline-level config vars for Review Apps and Heroku CI. Additionally, another small subset of Heroku users had their Heroku tokens exposed in a config var for a pipeline. This was identified on May 16, 2022, after further forensic investigation. We have no evidence of any unauthorized access to Heroku systems since April 14, 2022.

Any users affected by these issues were notified directly and provided with additional guidance. If you did not receive an email directly from us, we have no evidence that you were impacted by either of these recently identified issues. If you received an email from Salesforce (techcomms@mail.salesforce.com) and have identified suspicious activity, please contact security@salesforce.com.

For an update on our current progress with regards to the GitHub integration, please see this blog post.

so you can deploy manually through heroku CLI

as @MarcoWriteCode has mentioned the basis of the error that you are facing. I would suggest that you go through the Heroku CLI documentation and continue your deployment from here. https://devcenter.heroku.com/articles/getting-started-with-nodejs

Use heroku CLI for a bit, then switch back to github deploys