minor edits main.go, added challenge main.go #5

	name: Docker Image CI

	# publish new image when changes are made to the
	# Dockerfile, main.go, or any files in the templates directory
	on:
	push:
	paths:
	- 'Dockerfile'
	- 'main.go'
	- 'templates/**'

	env:
	REGISTRY: ghcr.io
	REPOSITORY: ${{ github.repository }}
	IMAGE_NAME: vault-sdk-go-app

	jobs:
	build:
	name: Build docker images
	runs-on: ubuntu-latest

	permissions:
	contents: read
	packages: write
	attestations: write
	id-token: write

	steps:
	- name: checkout code
	uses: actions/checkout@v5
	- name: Login to GitHub Container Registry
	uses: docker/login-action@v4
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GH_TOKEN_PACKAGES }}

	- name: Extract metadata for Docker
	id: meta
	uses: docker/metadata-action@v4
	with:
	images: ${{ env.REGISTRY }}/${{ env.REPOSITORY }}/${{ env.IMAGE_NAME }}
	tags: type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
	- name: Build and push Landing Page Docker image
	uses: docker/build-push-action@v7
	with:
	file: ./Dockerfile
	context: .
	push: true
	github-token: ${{ secrets.GH_TOKEN_PACKAGES }}
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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