Adding github actions support-3 #3

	name: Build

	# when to trigger a pipeline
	on:
	push:
	branches: [ "" ] # "" it will trigger for any branch, if "*" if branch name contains '/' it will not work

	# we can have multiple jobs build API, build UI
	jobs:
	build-bookmarker-api:
	name: Build bookmarker-api
	runs-on: ubuntu-latest # you can specify ubuntu version
	defaults:
	run:
	working-directory: ./bookmarker-api
	steps:
	- uses: actions/checkout@v4 # checks out code from github
	- name: Set up JDK 17
	uses: actions/setup-java@v4
	with:
	java-version: '17'
	distribution: 'temurin' # there are multiple distribution operations.
	cache: 'maven'
	- name: Build with Maven
	run: ./mvnw verify

	- if: ${{github.ref == 'refs/heads/main' }}
	name: Build and Publish Docker Image
	run:
	./mvwn clean package job:dockerBuild -DskipTests
	docker login -u ${{ secrets.DOCKER_USERNAME }} -p ${{ secrets.DOCKER_PASSWORD }}
	docker push ${{ secrets.DOCKER_USERNAME }}/bookmarker-api

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