Add an optional environment variable for docker images in order to easily and globally configure additional startup flags #1721

	name: maven-build

	on:
	push:
	branches: [ master, develop ]
	pull_request:
	branches: [ master, develop ]

	jobs:
	build:
	timeout-minutes: 20
	runs-on: ubuntu-latest
	steps:
	- name: git checkout
	uses: actions/checkout@v4
	- name: set up jdk 17
	uses: actions/setup-java@v4
	with:
	distribution: adopt
	java-version: 17
	- name: cache maven packages
	uses: actions/cache@v4
	with:
	path: ~/.m2/repository
	key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
	restore-keys: ${{ runner.os }}-maven-
	- name: build with maven
	run: mvn -B clean install -P pre-release -Djavacpp.platform=linux-x86_64
	- name: build and test with docker
	run: ./build-docker.sh
	- name: upload workspace if build fails
	# if: ${{ failure() }}
	if: ${{ false }}
	uses: actions/upload-artifact@v4
	with:
	name: build-results
	path: .
	retention-days: 5

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