Upload large files to CKAN

[mjanez]

CKAN's filestore was not designed to handle large file sizes (>GB), the alternative is to use cloud storage. ckanext-cloudstorage implements support for using S3, Azure, or any of the 15 different storage providers supported by libcloud for CKAN.

Check ckanext-cloudstorage setup and:

• Add ckanext-cloudstorage extension to /ckan/Dockerfile
• Add ckanext vars to .env (plugins, cloudstorage vars, etc.)