Cross-cutting concerns such as externalized configuration, logging, health checks, metrics, service registration and discovery, circuit breakers. There are also cross-cutting concerns that are specific to the technologies that the microservices uses.  

Create a microservice chassis framework that can be foundation for developing your microservices. The chassis implements

Reusable build logic that builds, and tests a service. This includes, for example, Gradle Plugins.

Mechanisms that handle cross-cutting concerns. The chassis typically assembles and configures a collection of frameworks and libraries that implement this functionality.

The Service Template is a sample service that uses the microservice chassis. 

Examples of frameworks that are the starting point for creating a microservice chassis:

Java

Spring Boot and Spring Cloud

Dropwizard  

https://microservices.io/patterns/microservice-chassis.html#:~:text=Cross%2Dcutting%20concerns%20such%20as,technologies%20that%20the%20microservices%20uses.