Main Tasks (Python app):
- Add production-ready Dockerfile with best practices
  - Non-root user (appuser)
  - Specific base image version (python:3.13-slim)
  - Proper layer ordering for caching
  - Health check implementation
- Create .dockerignore for optimized build context
- Add Docker section to README.md with usage examples
- Create comprehensive LAB02.md documentation
- Push image to Docker Hub (ellilin/devops-info-service:v1.0.0)
- Final image size: 208MB

Bonus Task (Go app - Multi-stage build):
- Implement multi-stage Dockerfile for Go application
  - Stage 1: Builder (golang:1.21-alpine) for compilation
  - Stage 2: Runtime (alpine:3.19) for minimal footprint
  - Static binary with stripped symbols (-ldflags='-s -w')
- Create .dockerignore for Go
- Build 31.6MB final image (91% smaller than single-stage)
- Push to Docker Hub (ellilin/devops-info-service-go:v1.0.0)
- Create detailed LAB02.md documentation explaining:
  - Multi-stage strategy and benefits
  - Size comparison analysis
  - Security implications
  - Technical explanation of each stage

Security:
- Both apps run as non-root user
- Minimal base images for reduced attack surface
- No build tools in production images
- Proper health checks implemented

…e CodeQL to v4, fix SARIF upload conditions

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