I followed the Getting Started guide of Dropwizard by executing the maven command below:
mvn archetype:generate -DarchetypeGroupId=io.dropwizard.archetypes -DarchetypeArtifactId=java-simple -DarchetypeVersion=0.9.1
Yes, I don't think a YAML file is generated by itself since Dropwizard can function without having one.
It's only when you tweak an inbuilt configuration or add one of your own, you'll need to specify it the
AppConfiguration class and provide the corresponding values in
P.S: There are other ways of providing the configuration like passing it as JVM args as described here but I wouldn't recommend using them.