feat: composite action wrapping docker/setup-buildx-action

action.yml

@@ -0,0 +1,30 @@
+name: setup-buildx
+description: |
+  Wrapper around docker/setup-buildx-action that defaults to the in-cluster
+  buildkit service running in the gitea namespace of the aceofbase cluster.
+  Lets workflow authors skip the boilerplate of pointing setup-buildx at a
+  remote driver.
+
+inputs:
+  endpoint:
+    description: 'BuildKit TCP endpoint. Defaults to the in-cluster service.'
+    required: false
+    default: 'tcp://buildkit.gitea.svc.cluster.local:1234'
+  install:
+    description: 'Set up docker build as alias to docker buildx build.'
+    required: false
+    default: 'false'
+  version:
+    description: 'buildx version to install (passed through).'
+    required: false
+    default: 'latest'
+
+runs:
+  using: composite
+  steps:
+    - uses: docker/setup-buildx-action@v3
+      with:
+        driver: remote
+        endpoint: ${{ inputs.endpoint }}
+        install: ${{ inputs.install }}
+        version: ${{ inputs.version }}