You are comparing apples to oranges, then. A modern Java framework like Spring Boot, Micronaut or Quarkus can start up with a 20mb heap and will require a Docker container or jar in the range of tens of megabytes.

Now, clearly to do more complex processing you'll want to give it more than tens of megabytes of heap, but if you are running Java applications that needs hundreds of megs of dependencies and 1gb of memory then you're probably running some legacy application server.