ci: allow arbitrary buildx/buildkit version on workflow dispatch event

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

.github/workflows/ci.yml

@@ -1,6 +1,16 @@
 name: ci
 
 on:
+  workflow_dispatch:
+    inputs:
+      buildx-version:
+        description: 'Buildx version or Git context'
+        default: 'latest'
+        required: false
+      buildkit-image:
+        description: 'BuildKit image'
+        default: 'moby/buildkit:buildx-stable-1'
+        required: false
   schedule:
     - cron: '0 10 * * *'
   push:
@@ -11,6 +21,10 @@ on:
       - 'v*'
   pull_request:
 
+env:
+  BUILDX_VERSION: latest
+  BUILDKIT_IMAGE: moby/buildkit:buildx-stable-1
+
 jobs:
   bake:
     runs-on: ubuntu-latest
@@ -37,7 +51,10 @@ jobs:
         id: buildx
         uses: docker/setup-buildx-action@v2
         with:
-          driver-opts: network=host
+          version: ${{ inputs.buildx-version || env.BUILDX_VERSION }}
+          driver-opts: |
+            image=${{ inputs.buildkit-image || env.BUILDKIT_IMAGE }}
+            network=host
       -
         name: Build and push
         uses: ./
@@ -105,6 +122,10 @@ jobs:
       -
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
+        with:
+          version: ${{ inputs.buildx-version || env.BUILDX_VERSION }}
+          driver-opts: |
+            image=${{ inputs.buildkit-image || env.BUILDKIT_IMAGE }}
       -
         name: Build
         uses: ./