Add workflow examples

Signed-off-by: Nick Adcock <nick.adcock@docker.com>

examples/push-on-tag.yml

@@ -0,0 +1,34 @@
+name: Build and push Docker image
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - '*'
+  pull_request:
+
+# Enables BuildKit
+env:
+  DOCKER_BUILDKIT: 1
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    # TODO: Change repository to the image's Docker repository name
+    - name: Build and push image
+      uses: docker/build-push-action@v0.1
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+        repository: myorg/myrepo
+        tag_with_ref: true
+        add_git_labels: true

examples/push-to-private-registry.yml

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+name: Build and push Docker image
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - '*'
+  pull_request:
+
+# Enables BuildKit
+env:
+  DOCKER_BUILDKIT: 1
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    # TODO: Change `repository` to the image's Docker repository name
+    # TODO: Change `registry` to your private registry's domain
+    - name: Build and push image
+      uses: docker/build-push-action@v0.1
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+        repository: myorg/myrepo
+        registry: docker.pkg.github.com
+        tag_with_ref: true
+        add_git_labels: true

examples/simple.yml

@@ -0,0 +1,34 @@
+name: Build and push Docker image
+
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - '*'
+  pull_request:
+
+# Enables BuildKit
+env:
+  DOCKER_BUILDKIT: 1
+
+jobs:
+
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    
+    - name: Checkout
+      uses: actions/checkout@v2
+
+    # TODO: Change repository to the image's Docker repository name
+    - name: Build and push image
+      uses: docker/build-push-action@v0.1
+      with:
+        username: ${{ secrets.DOCKER_USERNAME }}
+        password: ${{ secrets.DOCKER_PASSWORD }}
+        repository: myorg/myrepo
+        tag_with_ref: true
+        add_git_labels: true