Documentation:

• [acme] Add a note to certificatesDuration (#11808 by sMteX)
• [docker,k8s] Update Getting started Section with New Docker and Kubernetes Tutorial (#11714 by sheddy-traefik)
• [docker] Remove obsolete version field in compose files (#11798 by thomas-mauran)
• [k8s] Add a note about Ingress Backend Resource support (#11785 by edysli)
• [logs,metrics,tracing,accesslogs] Update the EntryPoints Documentation (#11856 by sheddy-traefik)
• [logs,metrics,tracing,accesslogs] Add New Observe Guides to the Documentation (#11828 by sheddy-traefik)
• [middleware] Remove conflicting information from the CircuitBreaker documentation. (#11835 by adk-swisstopo)
• [service] Clarify mirroring service default percent value (#11804 by Alexy-vda)
• [websocket] Add WebSocket guide (#11623 by NX211)

Misc:

• Merge branch v2.11 into v3.4 (#11859 by rtribotte)
• Merge branch v2.11 into v3.4 (#11831 by rtribotte)
• Merge branch v2.11 into v3.4 (#11810 by rtribotte)