convert project from Gradle to Maven builds #486

	name: ci-dgraph4j-tests
	on:
	push:
	branches:
	- master
	pull_request:
	types:
	- opened
	- reopened
	- synchronize
	- ready_for_review
	branches:
	- master
	schedule:
	- cron: "0 0 * * *" # run workflow daily
	jobs:
	build:
	name: dgraph4j-tests
	runs-on: ubuntu-20.04
	steps:
	- name: Checkout Dgraph repo # use latest dgraph build
	uses: actions/checkout@v4
	with:
	path: dgraph
	repository: dgraph-io/dgraph
	ref: main
	- name: Checkout dgraph4j repo
	uses: actions/checkout@v4
	with:
	path: dgraph4j
	- name: Setup Java
	uses: actions/setup-java@v4
	with:
	distribution: microsoft
	java-version-file: dgraph4j/.java-version
	- name: Get Go Version
	run: \|
	#!/bin/bash
	cd dgraph
	GOVERSION=$({ [ -f .go-version ] && cat .go-version; })
	echo "GOVERSION=$GOVERSION" >> $GITHUB_ENV
	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version: ${{ env.GOVERSION }}
	- name: Build dgraph binary
	run: cd dgraph && make docker-image # builds docker image with local tag
	- name: Spin up local dgraph cluster
	run: cd dgraph4j && docker compose -f docker-compose.test.yml up -d
	- name: Run tests
	run: cd dgraph4j && mvn clean install
	- name: Tear down cluster
	run: cd dgraph4j && docker compose -f docker-compose.test.yml down

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