v0.4.0

• Sidecars now support HTTP health checks. The health check endpoint can be provided as part of the sidecar configuration file. When the application fails to respond to a health check, it is unregistered from the service registry, causing the instance to be removed from the load balancing pool of other sidecars upon the next refresh.
• A special CLI mode for the a8sidecar binary that allows users to view the state inside the sidecar. (PR#335)
• Filebeat is no longer installed/configured/managed by the sidecar. It is the user's responsibility to aggregate the sidecar's nginx access logs through a log management system of their choice.
• Minor performance optimizations to the Lua code in the sidecar and bug fixes. Timeout support is currently disabled. Specifying timeouts in the rules will not have any effect. (PR#334)
• Registry now supports Eureka remote catalog, similar to Kubernetes catalog. Service registration info in Eureka will now be synced with the Amalgam8 service registry automatically. (PR#247)
• Eureka metadata tags are automatically translated into Amalgam8 instance tags in the service registry.
• Optimizations to the redis operations used in registry code
• The bookinfo example application is now a polyglot application, composed of services written in Java, Ruby, and Python.
• Simplification of the demo scripts: consolidate into fewer files and eliminate unnecessary scripts.
• All documentation has been moved to https://amalgam8.io/docs/