startup probe failed: connection refused

[CristoC84]

Hi guys!
This is my first time posting here and I apologize in advance if my request does not meet the rules. Please let me know and I will modify my post :)

Well, I've started very recently with the topic of containers but I really like this topic.

My job is the administration in Azure and among it is the availability of resources. I am in charge of making the containers ready for the provider to work on it.

A few weeks ago, they are having problems accessing from outside through postman throwing them 504 gateway errors and when testing via browser, it throws a stream timeout error.

I have reviewed the logs and I don't really understand where the problem could be.
The most common message is:

startup probe failed: connection refused

My "Container App Environment" is with the following configuration:
vnetConfiguration internal on 'false'.
With public static Ip
appLogsConfiguration to the Azure monitor.

My container application:
Ingress enabled --> Accepting traffic from anywhere.
HTTP input type
Client certificate mode Ignore
Transport Auto
Insecure connections disabled
Target port 3000
A persistent replica.

Your environment variables:
PORT 3000
and other variables pointing to a PostgreSQL server.

The Dockerfile:
EXPOSE 22
EXPOSE 3000

Any clues that can help me understand the source of the problem would be greatly appreciated.