fix: remove private registry from docker builds, push only to DockerHub

The BuildKit builder cannot push to the insecure HTTP registry at
registry.viktorbarzin.lan:5050 because buildkit_config is not being
applied by the plugin. Simplified to DockerHub-only push for now.
Private registry caching and push can be re-added once buildkit_config
issue is resolved.

.woodpecker/f1-stream.yml

@@ -16,9 +16,7 @@ steps:
       username: "viktorbarzin"
       password:
         from_secret: dockerhub-pat
-      repo:
-        - viktorbarzin/f1-stream
-        - registry.viktorbarzin.lan:5050/f1-stream
+      repo: viktorbarzin/f1-stream
       logins:
         - registry: https://index.docker.io/v1/
           username: viktorbarzin
@@ -29,11 +27,6 @@ steps:
       platforms: linux/amd64
       provenance: false
       tags: latest
-      cache_images: registry.viktorbarzin.lan:5050/f1-stream:buildcache
-      buildkit_config: |
-        [registry."registry.viktorbarzin.lan:5050"]
-          http = true
-          insecure = true
 
   - name: deploy
     image: bitnami/kubectl