Use dind for dry-run

Reviewed-on: #1

.woodpecker/docker.yaml

@@ -1,3 +1,10 @@
+matrix:
+  platform:
+    - linux/amd64
+    - linux/arm64
+
+labels:
+  platform: ${platform}
 
 when:
   branch: main
@@ -7,15 +14,12 @@ variables:
   - &repo source.hodakov.me/${CI_REPO_OWNER}/phpbb
 
 steps:
-  dryrun:
-    image: woodpeckerci/plugin-docker-buildx:5.1.0
-    privileged: true
-    settings:
-      dockerfile: Dockerfile
-      platforms: linux/arm64/v8,linux/amd64
-      dry_run: true
-      repo: *repo
-      auto_tag: true
+  test-build:
+    image: docker:27-dind
+    commands:
+      - docker build -t source.hodakov.me/hdkv/phpbb:${CI_COMMIT_SHA:0:10} .
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
     when:
       event: pull_request
 
@@ -24,7 +28,7 @@ steps:
     privileged: true
     settings:
       dockerfile: Dockerfile
-      platforms: linux/arm64/v8,linux/amd64
+      platforms: ${platform}
       repo: *repo
       registry: source.hodakov.me
       auto_tag: true