Central logging test

[erny]

• Try task lists
• Study ELK vs EFK
• Insert some logging in our app
• Configure log output handler (j son, etc.), should include application id
• Find and deploy docker image with docker compose
• Spin up environment and check if central logging works
• Check how to view / find log entries
• Develop and deploy another microservice with central logging
• Add X-Request-ID header to API gateway if it doesn't exist
• Make sure X-Request-ID is logged in both apps
• Try to relate log entries by X-Request-ID header