[bugfix/#344] 첨부파일이 필요한 게시판에서 생성, 수정할 때 첨부파일 빈 값으로 보내는 경우 검증로직 추가 #472

	name: Gradle Build

	on:
	pull_request:
	types: [ opened, reopened, synchronize ]


	jobs:
	build:
	runs-on: ubuntu-latest
	environment: build_gradle

	permissions:
	contents: read
	packages: write

	steps:
	- uses: actions/checkout@v4
	- name: Set up JDK 11
	uses: actions/setup-java@v4
	with:
	java-version: '11'
	distribution: 'adopt'

	- name: Cache Gradle packages
	uses: actions/cache@v3
	with:
	path: \|
	~/.gradle/caches
	~/.gradle/wrapper
	key: "${{ runner.os }}-gradle-${{ hashFiles('*/.gradle', '/gradle-wrapper.properties', '*/gradle.properties') }}"
	restore-keys: \|
	${{ runner.os }}-gradle-

	- name: Grant execute permission for gradlew
	run: chmod +x gradlew

	- name: Build with Gradle
	run: ./gradlew clean build

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