Add required buildx tags and set WOODPECKER_PLUGINS_PRIVILEGED for CLI check (#78)

To make privileged tag allowlist happy.

Reviewed-on: https://codeberg.org/Codeberg-CI/examples/pulls/78
Co-authored-by: pat-s <patrick.schratz@gmail.com>
Co-committed-by: pat-s <patrick.schratz@gmail.com>

.woodpecker.yaml

@@ -9,6 +9,8 @@ steps:
   woodpecker-cli:
     depends_on: []
     image: woodpeckerci/woodpecker-cli:v3.0.0-alpine
+    environment:
+      WOODPECKER_PLUGINS_PRIVILEGED: docker.io/woodpeckerci/plugin-docker-buildx
     commands:
       - woodpecker-cli lint Butane/.woodpecker/butane.yaml
       - woodpecker-cli lint C/

Docker/.woodpecker/buildx-multi-registries.yaml

@@ -9,7 +9,7 @@ when:
 
 steps:
   publish:
-    image: woodpeckerci/plugin-docker-buildx
+    image: docker.io/woodpeckerci/plugin-docker-buildx:latest
     settings:
       repo: 6543/tmp,codeberg.org/6543/tmp,<account-id>.dkr.ecr.<region>.amazonaws.com/6543/tmp
       tag: demo

Docker/.woodpecker/buildx.yaml

@@ -16,7 +16,7 @@ variables:
 
 steps:
   dryrun:
-    image: woodpeckerci/plugin-docker-buildx
+    image: docker.io/woodpeckerci/plugin-docker-buildx:latest
     settings:
       dockerfile: *file
       platforms: linux/arm/v7,linux/arm64/v8,linux/amd64,linux/ppc64le
@@ -28,7 +28,7 @@ steps:
       path: *file
 
   publish:
-    image: woodpeckerci/plugin-docker-buildx
+    image: docker.io/woodpeckerci/plugin-docker-buildx:latest
     settings:
       dockerfile: *file
       platforms: linux/arm/v7,linux/arm64/v8,linux/amd64,linux/ppc64le