How to proper set up HTTPS on AWS EC2?

👋

I'm running into problems while trying to run my API that's hosted on AWS EC2 through a HTTPS protocol.

The API runs normally without the ELB setup, however, after trying to configure (I follow the recommended steps), I get the 502 Bad Gateway message.

Here's my configuration:

• AWS EC2 (t3a.small) running a docker container of my ExpressJS app listening on port 3000;
• Security group with http:80 and https:443 open;
• ACM that covers the following domains (mydomain.com, *.mydomain.com);
• ELB listening to ports: http:80, https:443, https:3000;
• Route 53 with my hosted zone containing the A-type record with the ELB DNS value;

Previously URL

http://ec2-ip-address.zone.compute.amazonaws.com:3000/api/

Now

https://api.mydomain.com:443/api/{resourceName}

Please, I will appreciate any insight on how to properly set up in case I missed something let me know.