Push images tagged with git SHA
- Added additional Docker image pushes for different tags derived from the Git SHA to sync with updated tagging conventions.
Update Dockerfile for client build process, including changes to base image and dependencies. Add support for OPENGL_BASE_IMAGE environment variable to facilitate easier image customization and maintenance.
The commit updates the Minetest client Dockerfile by adjusting the COPY command indentation to correctly copy the minetest.conf file. Update docker version to 27.
Updated the Dockerfile to use single quotes for the EOF marker in the minetest.conf file copy operation, ensuring consistent code styling and improved readability.
Adjusted the docker build command in the GitLab CI configuration file to use `docker buildx build` instead of `docker buildx` for building the OpenGL image.
