feat: 当没有事件的场景下，同步helm仓库后用于index文件刷新#2434 #33

	# This is a basic workflow to help you get started with Actions

	name: Backend CI

	# Controls when the action will run. Triggers the workflow on push or pull request
	# events but only for the master branch
	on:
	push:
	branches: [ master ]
	paths:
	- 'src/backend/**'
	pull_request:
	branches: [ master, release-* ]
	paths:
	- 'src/backend/**'

	# A workflow run is made up of one or more jobs that can run sequentially or in parallel
	jobs:
	# This workflow contains a single job called "build"
	build:
	# The type of runner that the job will run on
	runs-on: ubuntu-latest

	# Steps represent a sequence of tasks that will be executed as part of the job
	steps:
	# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
	- uses: actions/checkout@v2
	- name: Set up JDK 1.8
	uses: actions/setup-java@v1
	with:
	java-version: 1.8
	- name: Cache Gradle
	uses: actions/cache@v1
	with:
	path: ~/.gradle/caches
	key: ${{ runner.os }}-gradle-${{ hashFiles('*/.gradle*') }}
	restore-keys: \|
	${{ runner.os }}-gradle-
	- name: Gradle Build
	working-directory: src/backend/
	run: \|
	./gradlew clean build

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