Add dependabot and linting

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    labels:
+      - dependabot
+      - actions
+    schedule:
+      interval: daily
+
+  - package-ecosystem: docker
+    directory: /
+    labels:
+      - dependabot
+      - docker
+    schedule:
+      interval: daily

.github/linters/.markdown-lint.yml

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+# Unordered list style
+MD004:
+  style: dash
+
+# Ordered list item prefix
+MD029:
+  style: one

.github/linters/.yaml-lint.yml

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+rules:
+  document-end: disable
+  document-start:
+    level: warning
+    present: false
+  line-length:
+    level: warning
+    max: 80
+    allow-non-breakable-words: true
+    allow-non-breakable-inline-mappings: true

.github/workflows/ci.yml

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+name: Continuous Integration
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches-ignore:
+      - main
+
+jobs:
+  test-docker:
+    name: Docker Tests
+    runs-on: ubuntu-latest
+
+    # Run a local registry to push to
+    services:
+      registry:
+        image: registry:2
+        ports:
+          - 5001:5000
+
+    env:
+      TEST_TAG: localhost:5001/actions/hello-world-docer-action:latest
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Docker BuildX
+        id: setup-buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          install: true
+          driver-opts: network=host
+
+      - name: Build the Container
+        id: build
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ${{ env.TEST_TAG }}
+
+      - name: Run the Container
+        id: run
+        env:
+          INPUT_WHO_TO_GREET: Mona Lisa Octocat
+        run: |
+          docker run \
+            --env INPUT_WHO_TO_GREET="${{ env.INPUT_WHO_TO_GREET }}" \
+            --rm ${{ env.TEST_TAG }}
+
+  test-action:
+    name: GitHub Actions Test
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+
+      - name: Test Local Action
+        id: test-action
+        uses: ./
+        with:
+          who-to-greet: Mona Lisa Octocat
+
+      - name: Print Output
+        id: output
+        run: echo "${{ steps.test-action.outputs.greeting }}"

.github/workflows/linter.yml

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+name: Lint Code Base
+
+on:
+  pull_request:
+    branches:
+      - main
+  push:
+    branches:
+      - main
+
+jobs:
+  lint:
+    name: Lint Code Base
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      packages: read
+      statuses: write
+
+    steps:
+      - name: Checkout
+        id: checkout
+        uses: actions/checkout@v4
+
+      - name: Lint Code Base
+        id: super-linter
+        uses: super-linter/super-linter/slim@v5
+        env:
+          DEFAULT_BRANCH: main
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}