Fix error message in notifications and truncate container image text #357

	name: Build
	on:
	pull_request:
	workflow_call:
	outputs:
	image_tag:
	description: The tag for the built image
	value: ${{ jobs.build.outputs.image_tag }}
	jobs:
	build:
	runs-on: ubuntu-latest
	outputs:
	image_tag: ${{ steps.build.outputs.image_tag }}
	steps:
	- uses: actions/checkout@v3
	- uses: cachix/install-nix-action@v20
	- uses: cachix/cachix-action@v12
	with:
	name: tstr
	authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
	- name: Validate generated code is up to date
	run: \|
	nix develop -c dev/up
	nix develop -c dev/gen
	nix develop -c dev/down
	if [ -n "$(git status --porcelain)" ]; then
	echo "There is outdated generated code. Please regenerate with `dev/gen`.";
	git status
	exit 1
	fi
	- name: Build container image
	id: build
	run: \|
	nix build .#image
	echo "image_tag=$(nix eval --raw .#image.imageTag)" >> $GITHUB_OUTPUT
	- name: Upload built image
	uses: actions/upload-artifact@v3
	with:
	name: image
	path: result
	push:
	runs-on: ubuntu-latest
	needs: build
	if: github.ref == 'refs/heads/main'
	outputs:
	image_tag: ${{ steps.push.outputs.image_tag }}
	steps:
	- name: Download built image
	uses: actions/download-artifact@v3
	with:
	name: image
	- name: Load container image
	run: "docker load < result"
	- name: Login to Docker Hub
	uses: docker/login-action@v2
	with:
	username: nanzhong
	password: ${{ secrets.DOCKERHUB_ACCESS_TOKEN }}
	- name: Push container image
	id: push
	run: \|
	docker push "nanzhong/tstr:${{ needs.build.outputs.image_tag }}"
	echo "image_tag=${{ needs.build.outputs.image_tag }}" >> $GITHUB_OUTPUT

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