Provide pre-built Docker image for easy Synology/NAS deployment

First of all, thank you for this awesome project! It's exactly what I was looking for to manage my ESP screens with Home Assistant.

Is your feature request related to a problem? Please describe. I'm trying to deploy this container on a Synology NAS using the built-in Container Manager. However, the current docker-compose.yml uses a Git URL in the build.context.

Synology's Container Manager does not include git in its build environment, which results in the following error: unable to prepare context: unable to find 'git': exec: "git": executable file not found in $PATH

Manually cloning the repository via SSH works, but it makes the installation and future updates very cumbersome for NAS users, as we have to manually pull the code and rebuild the image every time.

Describe the solution you'd like Could you please publish a pre-built Docker image to Docker Hub or GitHub Container Registry (GHCR)?

If a ready-to-use image is available, the docker-compose.yml could simply use:

image: ghcr.io/maxgramser/homeassistant_espscreen:latest # or your Docker Hub username