Update docker

Changes:

- https://github.com/docker-library/docker/commit/e5a756b: Merge pull request https://github.com/docker-library/docker/pull/239 from infosiftr/alpine3.12
- https://github.com/docker-library/docker/commit/eb305f7: Update to Alpine 3.12

library/docker

@@ -6,7 +6,7 @@ GitRepo: https://github.com/docker-library/docker.git
 
 Tags: 19.03.11, 19.03, 19, stable, test, latest
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 1e1315f53a45ee2563afb97880feadfad2eb3059
+GitCommit: eb305f71421bf772cfac2a46571280ff90f60033
 Directory: 19.03
 
 Tags: 19.03.11-dind, 19.03-dind, 19-dind, stable-dind, test-dind, dind