add exit injection via env for Go app #6

	name: build-push-go

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main

	jobs:
	build-push-go:
	runs-on: ubuntu-latest
	env:
	DOCKER_CLI_EXPERIMENTAL: "enabled"
	ARCH: "amd64"
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}-go
	DOCKER_IMAGE_TAG: ${{ github.sha }}
	steps:
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1
	- name: Docker Login
	uses: docker/login-action@v1
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.repository_owner }}
	password: ${{ secrets.GITHUB_TOKEN }}
	- name: Set up pack
	uses: buildpacks/github-actions/setup-pack@v5.0.0
	- name: Checkout code
	uses: actions/checkout@v2
	with:
	fetch-depth: 0
	- name: build
	run: \|
	pack build ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ env.DOCKER_IMAGE_TAG }} \
	--path ./go \
	--builder paketobuildpacks/builder-jammy-buildpackless-static \
	--buildpack paketo-buildpacks/go \
	--tag ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest \
	--publish

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