ci(docker): Remove ARM64 platform from multi-arch builds

- Remove linux/arm64 from supported build platforms
- Simplify Docker image builds to single amd64 architecture
- Reduces build time and complexity for CI/CD pipeline

Author: MUGISHA-Pascal

.github/workflows/docker.yml

@@ -79,6 +79,6 @@ jobs:
           context: .
           file: ./Dockerfile
           push: ${{ github.event_name != 'pull_request' }}
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/amd64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}