Support for Docker on arm64

[RodrigoPrestes]

Describe the issue
When trying to create a container on a Raspberry Pi the following error appear on the logs:
ERR msg=exec container process '/sbin/tini': Exec format error
Looking up the error, it seems the image is built only for x86.

To Reproduce
Steps to reproduce the behavior:

1. Setup the image on a Raspberry Pi (personally I use Portainer so I just created a new stack with the contents of the docker-compose.yml)
2. Start the container
3. See error

Additional context
Looking at the build-push-action repo and the Docker documentation it looks simply to just update the build.yml to:

name: Publish Docker Container

on: 
  push:
    branches:
      - main

jobs:
  publish:
    name: Publish Docker Container
    runs-on: ubuntu-latest
    steps:
      -
        name: Set up QEMU
        uses: docker/setup-qemu-action@v3
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      -
        name: Login to GitHub Container Registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}
      -
        name: Build and push server
        uses: docker/build-push-action@v6
        with:
          tags: ghcr.io/subdavis/kobodl:latest
          push: true

But it didn't tested this change.