Update BlueXolo docker image

[snvc00]

Summary

• Update dockerfile to build BlueXolo image
  • bluexolo-dev.dockerfile
  • bluexolo-prod.dockerfile
• Add new dockerfiles to build other required services (let BlueXolo image just for running django or celery)
  • Robot Framework SSH servers
  • Nginx to serve static and media files
• Create a multi container environment to run BlueXolo with Docker Compose
  • Development environment in docker-compose.yaml
  • Production environment in docker-compose-deploy.yaml
• Modify settings.py to use environment variables instead of JSON file
• Update versions in requirements.txt
• Add configurations for production environments in settings.py
• Use static instead of staticfiles in all templates (required due a Django update)