CICD - Add logo from AWS S3 to template.json sent to Algolia

[FlorentLvr]

When a PR is merged, I want to add the logo (URL) of the tool/library in the template.json field image_url .
The URL should come from AWS S3

[FlorentLvr]

This process can be added in generate readme process: https://github.com/jupyter-naas/awesome-notebooks/blob/master/generate_readme.ipynb