Fix the missing env variable issue

[zhiltsov-max]

Motivation and context

Fixes #5448, #5453, #5457

• Relaxed env var requirements in the images, no mandatory ones
• RQ workers now use a custom python class for remote debugging
• Factored out common remote debugging implementation

How has this been tested?

Checklist

• I submit my changes into the develop branch
• I have added a description of my changes into CHANGELOG file
• I have updated the documentation accordingly
• I have added tests to cover my changes
• I have linked related issues (read github docs)
• I have increased versions of npm packages if it is necessary (cvat-canvas,
  cvat-core, cvat-data and cvat-ui)

License

• I submit my code changes under the same MIT License that covers the project.
  Feel free to contact the maintainers if that's a concern.

[knidarkness]

Is there any chance for this to be merged soon? We are blocked by the issue this PR solves, yet we need webhooks support, which is not yet in the master branch, so I was wondering if there's something blocking this PR.

Thanks

[nmanovic]

LGTM

[DeepBlue27]

this fixed nothing :\ the problem persist

[zhiltsov-max]

@DeepBlue27 , @knidarkness
Hi, please run docker pull cvat/server:dev and restart the containers with docker-compose down && docker-compose up -d to update your local Docker images to the fixed version. If you're using custom images, please rebuild them with docker-compose -f docker-compose.yml -f docker-compose.dev.yml build and restart the containers.