AWS App Runner Health Check Failed

Hi,

I have Python app that process data and I am running it in Docker. Locally, it is working fine. When I tried for a first time to run on AWS App Runner I needed health check, so I expose 80 port of container and install nginx that listen on that port. When I run container locally I can access the nginx homepage. I was trying to setup health check in AWS App Runner. I am using TCP check on port 80. For some reasons it is failing all the time. Could you please give me some suggestions what could be the issue?

Thank you in advance!