[Local] Using multi stage build to build docker image

### Description
After https://github.com/DeKal/illuminati/issues/241, we need to upgrade docker into multi stage build. Basically the idea is that we'll build the executive jar in docker container instead of build on local. https://docs.docker.com/develop/develop-images/multistage-build/
We will have 2 stages:
1) Stage build: copy source code to a gradle container -> build for the executive jar
2) Copy the jar into a jdk container to run

The issue names no Dockerfile or test path. Start by locating the Docker build entry point and the Gradle project configuration, then verify that the image builds the executable jar in a build stage and runs the copied jar in a JDK stage. Done means the multi-stage image builds successfully without a local jar build.

Written by the indexing model from the issue text.