HTTPS only mode (disable HTTP Permanently)

**Have you read the documentation?**
- [x] Yes, but it does not include related information regarding my question.
- [ ] Yes, but the steps described in the documentation do not work on my machine.
- [ ] Yes, but I am having difficulty understanding it and want clarification.

**You are setting up gotify in**
- [ ] Docker
- [x] Linux native platform
- [ ] Windows native platform

**Describe your problem**

I want to disable plain HTTP completely and only use HTTPS only but don't know how i can disable it completely
Can someone help me a bit

**Any errors, logs, or other information that might help us identify your problem**

Ex: `docker-compose.yml`, `nginx.conf`, android logcat, browser requests, etc.

Name of the information here

contents here