API not working

[melvincv]

Even when I give a valid API key, this docker version says "Valid API key required". I gave my public IP and ran this command from my PC:
$ curl -d "{}" -H "X-API-Key: xxxxxxxxxxxxxxxxxxxxxxxxx https://domain.tld/api/tickets.json
Valid API key required

[melvincv]

This container is running inn an EC2 instance in AWS and is behind an Application Load Balancer.
Here is the docker-compose.yml:
https://pastebin.com/wb1B8bq2