Initial commit

.github/workflows/0-welcome.yml

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+name: Step 0, Welcome
+
+# This step triggers after the learner creates a new repository from the template.
+# This workflow updates from step 0 to step 1.
+
+# This will run every time we create push a commit to `main`.
+# Reference: https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+# Reference: https://docs.github.com/en/actions/security-guides/automatic-token-authentication
+permissions:
+  # Need `contents: read` to checkout the repository.
+  # Need `contents: write` to update the step metadata.
+  contents: write
+
+jobs:
+  # Get the current step to only run the main job when the learner is on the same step.
+  get_current_step:
+    name: Check current step number
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - id: get_step
+        run: |
+          echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
+    outputs:
+      current_step: ${{ steps.get_step.outputs.current_step }}
+
+  on_start:
+    name: On start
+    needs: get_current_step
+
+    # We will only run this action when:
+    # 1. This repository isn't the template repository.
+    # 2. The step is currently 0.
+    # Reference: https://docs.github.com/en/actions/learn-github-actions/contexts
+    # Reference: https://docs.github.com/en/actions/learn-github-actions/expressions
+    if: >-
+      ${{ !github.event.repository.is_template
+          && needs.get_current_step.outputs.current_step == 0 }}
+
+    # We'll run Ubuntu for performance instead of Mac or Windows.
+    runs-on: ubuntu-latest
+
+    steps:
+      # We'll need to check out the repository so that we can edit the README.
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # Let's get all the branches.
+
+      # Make a branch, and commit for the learner.
+      - name: Prepare a branch
+        run: |
+          echo "Make sure we are on step 0"
+          if [ "$(cat .github/steps/-step.txt)" != 0 ]
+          then
+            echo "Current step is not 0"
+            exit 0
+          fi
+
+          echo "Make a branch"
+          BRANCH=cd
+          git checkout -b $BRANCH
+
+          echo "Make an empty commit"
+          git config user.name github-actions
+          git config user.email [email protected]
+          git commit --message="Create empty commit" --allow-empty
+
+          echo "Push"
+          git push --set-upstream origin $BRANCH
+
+          echo "Restore main"
+          git checkout main
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      # In README.md, switch step 0 for step 1.
+      - name: Update to step 1
+        uses: skills/action-update-step@v2
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          from_step: 0
+          to_step: 1
+          branch_name: cd

.github/workflows/1-create-the-workflow-file.yml

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+name: Step 1, Create the workflow file
+
+# This step triggers after the user creates `publish.yml` on branch `cd`.
+# This workflow updates from step 1 to step 2.
+
+# This will run every time we push `publish.yml` on branch `cd`.
+# Reference: https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - cd
+    paths:
+      - .github/workflows/publish.yml
+
+# Reference: https://docs.github.com/en/actions/security-guides/automatic-token-authentication
+permissions:
+  # Need `contents: read` to checkout the repository.
+  # Need `contents: write` to update the step metadata.
+  contents: write
+
+jobs:
+  # Get the current step to only run the main job when the learner is on the same step.
+  get_current_step:
+    name: Check current step number
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - id: get_step
+        run: |
+          echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
+    outputs:
+      current_step: ${{ steps.get_step.outputs.current_step }}
+
+  on_create_publish_yml:
+    name: On create publish yml
+    needs: get_current_step
+
+    # We will only run this action when:
+    # 1. This repository isn't the template repository.
+    # 2. The step is currently 1.
+    # Reference: https://docs.github.com/en/actions/learn-github-actions/contexts
+    # Reference: https://docs.github.com/en/actions/learn-github-actions/expressions
+    if: >-
+      ${{ !github.event.repository.is_template
+          && needs.get_current_step.outputs.current_step == 1 }}
+
+    # We'll run Ubuntu for performance instead of Mac or Windows.
+    runs-on: ubuntu-latest
+
+    steps:
+      # We'll need to check out the repository so that we can edit the README.
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # Let's get all the branches.
+
+      # Check the learner added intended contents to the file.
+      - name: Verify publish.yml file contents
+        uses: skills/action-check-file@v1
+        with:
+          file: ".github/workflows/publish.yml"
+          search: "docker/build-push-action"
+
+      # In README.md, switch step 1 for step 2.
+      - name: Update to step 2
+        uses: skills/action-update-step@v2
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          from_step: 1
+          to_step: 2
+          branch_name: cd

.github/workflows/2-add-a-dockerfile.yml

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+name: Step 2, Add a Dockerfile
+
+# This step triggers after we push changes to `Dockerfile` on branch `cd`.
+# This workflow updates from step 2 to step 3.
+
+# This will run every time we push changes to `Dockerfile` on branch `cd`.
+# Reference: https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - cd
+    paths:
+      - Dockerfile
+
+# Reference: https://docs.github.com/en/actions/security-guides/automatic-token-authentication
+permissions:
+  # Need `contents: read` to checkout the repository.
+  # Need `contents: write` to update the step metadata.
+  contents: write
+
+jobs:
+  # Get the current step to only run the main job when the learner is on the same step.
+  get_current_step:
+    name: Check current step number
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - id: get_step
+        run: |
+          echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
+    outputs:
+      current_step: ${{ steps.get_step.outputs.current_step }}
+
+  on_push_dockerfile:
+    name: On push Dockerfile
+    needs: get_current_step
+
+    # We will only run this action when:
+    # 1. This repository isn't the template repository.
+    # 2. The step is currently 2.
+    # Reference: https://docs.github.com/en/actions/learn-github-actions/contexts
+    # Reference: https://docs.github.com/en/actions/learn-github-actions/expressions
+    if: >-
+      ${{ !github.event.repository.is_template
+          && needs.get_current_step.outputs.current_step == 2 }}
+
+    # We'll run Ubuntu for performance instead of Mac or Windows.
+    runs-on: ubuntu-latest
+
+    steps:
+      # We'll need to check out the repository so that we can edit the README.
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # Let's get all the branches.
+
+      # Check the learner added intended contents to the file.
+      - name: Verify Dockerfile contents
+        uses: skills/action-check-file@v1
+        with:
+          file: "Dockerfile"
+          search: "FROM nginx:1.24-alpine"
+
+      # In README.md, switch step 2 for step 3.
+      - name: Update to step 3
+        uses: skills/action-update-step@v2
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          from_step: 2
+          to_step: 3
+          branch_name: cd

.github/workflows/3-merge-your-pull-request.yml

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+name: Step 3, Merge your pull request
+
+# This step triggers after pushing to main.
+# This workflow updates from step 3 to step 4.
+
+# This will run every time we push to main.
+# Reference: https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+
+# Reference: https://docs.github.com/en/actions/security-guides/automatic-token-authentication
+permissions:
+  # Need `contents: read` to checkout the repository.
+  # Need `contents: write` to update the step metadata.
+  contents: write
+
+jobs:
+  # Get the current step to only run the main job when the learner is on the same step.
+  get_current_step:
+    name: Check current step number
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - id: get_step
+        run: |
+          echo "current_step=$(cat ./.github/steps/-step.txt)" >> $GITHUB_OUTPUT
+    outputs:
+      current_step: ${{ steps.get_step.outputs.current_step }}
+
+  on_push_main:
+    name: On push main
+    needs: get_current_step
+
+    # We will only run this action when:
+    # 1. This repository isn't the template repository.
+    # 2. The step is currently 3.
+    # Reference: https://docs.github.com/en/actions/learn-github-actions/contexts
+    # Reference: https://docs.github.com/en/actions/learn-github-actions/expressions
+    if: >-
+      ${{ !github.event.repository.is_template
+          && needs.get_current_step.outputs.current_step == 3 }}
+
+    # We'll run Ubuntu for performance instead of Mac or Windows.
+    runs-on: ubuntu-latest
+
+    steps:
+      # We'll need to check out the repository so that we can edit the README.
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0 # Let's get all the branches.
+
+      # In README.md, switch step 3 for step 45X.
+      - name: Update to step 45X
+        uses: skills/action-update-step@v2
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          from_step: 3
+          to_step: 45X
+          branch_name: cd