Refactor workflows to trigger on PRs and optimize Dockerfiles

[Uj5Ghare]

🔧 Dockerfile Optimization

📋 Summary Enhanced Dockerfiles with specific package versions and streamlined build processes for reproducible deployments.

🔄 Changes

• Payment: Pinned Alpine package versions for build consistency
• Ratings: Added composer stage and specific Debian versions
• Shipping: Simplified multi-stage build with optimized base images

🎯 Benefits
✅ Reproducible builds with fixed package versions
✅ Cleaner Dockerfile structure
✅ Optimized build performance
✅ Better security with version pinning

📁 Files

• payment/Dockerfile
• ratings/Dockerfile
• shipping/Dockerfile