[FREEMARKER-7] convert to Maven build #3

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	name: Java CI

	on: [push, pull_request]

	# clear all permissions for GITHUB_TOKEN
	permissions: {}

	jobs:
	build:

	# execute on any push or pull request from forked repo
	if: github.event_name == 'push' \|\| ( github.event_name == 'pull_request' && github.event.pull_request.head.repo.fork )

	strategy:
	matrix:
	os: [ubuntu-latest, windows-latest, macOS-latest]
	jdk: [8, 11, 17]
	fail-fast: false

	runs-on: ${{ matrix.os }}

	steps:
	- uses: actions/checkout@v4
	with:
	persist-credentials: false

	- uses: actions/setup-java@v3
	with:
	java-version: ${{ matrix.jdk }}
	distribution: 'temurin'
	cache: 'maven'

	- name: Build with Maven
	run: mvn verify -e -B -V -ntp

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