Konrad B

Create Dockerfile for backend

2

Resolves L2B-4767

Improve docker build stages

1

Use `turbo prune` functionality to exclude unnecessary packages and dependencies from final package.

[Bug]: Deployment failing due to helper container name being already in use

1

### Error Message and Logs ``` 2025-Dec-10 10:55:21.005030 Preparing container with helper image: ghcr.io/coollabsio/coolify-helper:1.0.12 2025-Dec-10 10:55:21.487771 [CMD]: docker stop --time=30 nwg8sk48wgccksok4s8s8kog 2025-Dec-10 10:55:21.487771 Flag --time has been deprecated, use --timeout...