could not use another port for testing in local (only port 80 that works in port forwarding)

using port 80, the project work just fine, but when i try to tweek it a little bit to use other port, it could not works.

here's my compose.yaml
```
services:
wp:
build:
context: .
dockerfile: Dockerfile
ports:
- 80:8080
```

Start by reproducing the port-forwarding behavior from compose.yaml, comparing the working 80:8080 mapping with another host port. Read the referenced Dockerfile and verify which port the container exposes or listens on. Done means the project works locally through a non-80 host port, with the working mapping documented or tested.

Written by the indexing model from the issue text.