ci: push images to artifactapi registry instead of gitea

Hard switch of the docker push target from the Gitea registry to the
artifactapi local docker registry (docker-internal); the Gitea VM and its
registry are being retired. Drops the droneci/DRONECI_PASSWORD creds since
artifactapi accepts unauthenticated in-cluster pushes. Also updates the README push note.

Claude-Session: https://claude.ai/code/session_015ur3i7D2azsMAWTSVABApv

.woodpecker/build.yaml

@@ -5,6 +5,6 @@ steps:
   - name: docker-build-operator
     image: woodpeckerci/plugin-docker-buildx
     settings:
-      repo: git.unkin.net/unkin/cephrgw-operator
+      repo: artifactapi.k8s.syd1.au.unkin.net/docker-internal/cephrgw-operator
       dockerfile: Dockerfile.operator
       dry_run: true

.woodpecker/docker.yaml

@@ -6,12 +6,9 @@ steps:
   - name: docker-operator
     image: woodpeckerci/plugin-docker-buildx
     settings:
-      registry: git.unkin.net
+      registry: artifactapi.k8s.syd1.au.unkin.net
-      repo: git.unkin.net/unkin/cephrgw-operator
+      repo: artifactapi.k8s.syd1.au.unkin.net/docker-internal/cephrgw-operator
       dockerfile: Dockerfile.operator
-      username: droneci
-      password:
-        from_secret: DRONECI_PASSWORD
       tags:
         - ${CI_COMMIT_TAG}
         - latest

README.md

@@ -177,7 +177,8 @@ kubectl apply -f hack/kind/manifests/     # edit the Secret first
 
 Woodpecker runs `pre-commit` (gofmt + vet), `test`, and a dry-run image `build`
 on pull requests; pushing a `v*` tag builds and pushes
-`git.unkin.net/unkin/cephrgw-operator` to the Gitea registry. Bump a release
+`artifactapi.k8s.syd1.au.unkin.net/docker-internal/cephrgw-operator` to the
+artifactapi local docker registry. Bump a release
 with `make patch|minor|major`.
 
 ## Notes & caveats