Add deploy GitHub Action workflow

.github/workflows/deploy.yml

@@ -0,0 +1,34 @@
+name: Deploy
+
+run-name: Deploy ${{ inputs.gitRef || github.event.release.tag_name  }} to ${{ inputs.environment || 'integration' }}
+
+on:
+  workflow_dispatch:
+    inputs:
+      gitRef:
+        description: 'Commit, tag or branch name to deploy'
+        required: true
+        type: string
+      environment:
+        description: 'Environment to deploy to'
+        required: true
+        type: choice
+        options:
+        - integration
+        - staging
+        - production
+        default: 'integration'
+  release:
+    types: [released]
+
+jobs:
+  build-and-publish-image:
+    if: github.event_name == 'workflow_dispatch' || startsWith(github.event.release.tag_name, 'v')
+    name: Build and publish image
+    uses: alphagov/govuk-infrastructure/.github/workflows/build-and-push-multiarch-image.yml@main
+    with:
+      gitRef: ${{ inputs.gitRef || github.event.release.tag_name }}
+    permissions:
+      id-token: write
+      contents: read
+      packages: write