Add GitHub Actions Workflow to build and selftest

.github/workflows/build.yaml

@@ -0,0 +1,56 @@
+name: Build
+
+on:
+  pull_request:
+    paths-ignore:
+      - '**.md'
+  push:
+    paths-ignore:
+      - '**.md'
+    branches:
+      - master
+    tags:
+      - v**
+
+jobs:
+  build:
+    name: Docker
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - name: Login to GitHub Container Registry
+      uses: docker/login-action@v1
+      with:
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+        registry: ghcr.io
+    - name: Generate Docker meta names
+      uses: docker/metadata-action@v3
+      id: meta
+      with:
+        images: ghcr.io/${{ github.repository }}
+        tags: |
+          type=ref,event=tag
+          type=raw,enable=${{ !startsWith(github.ref, 'refs/tags/') }},value=master
+    - name: Build Docker image
+      uses: docker/build-push-action@v2
+      with:
+        push: ${{ github.event_name != 'pull_request' }}
+        tags: ${{ steps.meta.outputs.tags }}
+        labels: ${{ steps.meta.outputs.labels }}
+        context: .
+    - name: Test
+      if: ${{ false && github.event_name == 'pull_request' }}
+      uses: ./
+      with:
+        owner: ${{ github.repository_owner }}
+        repo: trigger-workflow-and-wait
+        ref: ${{ github.event.repository.default_branch || 'master' }}
+        github_token: ${{ secrets.GITHUB_PERSONAL_ACCESS_TOKEN }}
+        workflow_file_name: selftest.yaml
+        client_payload: '{"test": "true"}'
+        wait_interval: 11
+        last_workflow_interval: 5
+        trigger_workflow: true
+        wait_workflow: true
+        propagate_failure: true

.github/workflows/selftest.yaml

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+name: Self-test
+
+on:
+  workflow_dispatch:
+    inputs:
+      test:
+        type: boolean
+        default: false
+        description: A pointless checkbox.
+
+jobs:
+  wait:
+    name: Wait
+    runs-on: ubuntu-latest
+    steps:
+    - name: Do nothing
+      run: sleep 30