feature: Create CI/CD for backend deploys

[RafaDSan]

1. Set up GitHub Actions

• Create .github/workflows directory in the repository
• Create workflow file: main.yml for the CI/CD pipeline
• Check an example here

2. Configure Pipeline Steps

• Install Node.js
• Cache npm dependencies
• Install project dependencies
• Build the application

3. Deployment

• Set up environment secrets in GitHub
• Configure deployment steps for each environment:
  Build Docker image
  Push to registry
  Deploy to server

Important notes:

Ensure all environment variables are properly set in GitHub Secrets
Test the pipeline in a feature branch before merging to main branches

Set up branch protection rules:

• Require passing CI checks before merging

[RafaDSan]

P2 as it is a nice automation to have but it does not block any tasks