deprecate rules_docker (#2277)

Author: linzhp

README.md

@@ -6,14 +6,7 @@
 
 ## Status
 
-🚨 rules_docker is in minimal maintenance mode.
-
-- The maintainers have very little time, and are unlikely to review PRs or respond to issues.
-- Releases will be infrequent or may not happen at all.
-- The maintainers are determining if the project has a long-term future, and hope to post a roadmap soon.
-
-You may find more details in
-[the discussion](https://github.com/bazelbuild/rules_docker/discussions/2038).
+🚨 rules_docker is no longer maintained and deprecated. Please see [rules_oci](https://github.com/bazel-contrib/rules_oci) for a better designed and maintained alternative.
 
 ## Basic Rules