Style changes, cleanup and improved integration with CI by leveraging the use of
shared cache between all workflows (not functional until all workflows have been
refactored).
This is one of various PR to refactor the entire SearXNG Docker workflow.
Switches to Python glibc based images, all dependencies are installed via pip and not from system repositories, and several minor changes.
This PR will increase the image size from 194.9 MB to 345.47 MB (amd64), this is due to ARMv7 images (needs dependencies for wheels compilation and runtime (?)) and uWSGI webserver. Later PR will reduce the final image size.
Ivan Gabaldon