.dockerignore

-# Created by .ignore support plugin (hsz.mobi)
+# Exclude all...
 **
+
+# ...except essential
 !/Dockerfile

.gitignore

-/roles/
-/.idea/
-*.iml
+# Exclude all...
+**
+
+# ...except essential
+!/.dockerignore
+!/.gitignore
+!/.gitlab-ci.yml
+!/.hadolint.yaml
+!/Dockerfile
+!/Readme.md

Dockerfile

 FROM docker:latest
-COPY --from=docker/buildx-bin:latest /buildx /usr/libexec/docker/cli-plugins/docker-buildx
+COPY --from=registry.cyberbrain.pw/tools/docker/docker-buildx-bin:latest /buildx /usr/libexec/docker/cli-plugins/docker-buildx
 RUN set -x && \
     docker buildx version && \
     docker buildx install