Nope, the book discusses new features in ES2015 and later. It doesn't use any javascript framework in particular, but it touches basic tooling that will be useful for JS developers.
If you work with Big Data tools, it would be worth it to know Scala. A lot of Big Data and Stream processing tools out there are written in Scala, such as Apache Kafka or Spark.
Microservices can be written in absolutely any language. I believe that JavaScript was chosen because of its strong ecosystem and how accessible and readable it is to other developers.