Reduce Docker Daemon Context

[OneCricketeer]

Subject of the issue

The context sends too much information, IMO

 => [internal] load build context                                                                                                                                                                                                                                                                             0.4s
 => => transferring context: 24.65MB 

Steps to reproduce

./gradlew clean build
docker build --no-cache -t img .

Expected behaviour

The context can be reduced to only include the necessary files.

Ideally, multi-stage builds are used from a gradle base image, then copied to the JRE image.