Update docker

Changes:

- https://github.com/docker-library/docker/commit/ec5d64f: Update 20.10 to 20.10.3
- https://github.com/docker-library/docker/commit/835c371: Update 19.03 to 19.03.15
- https://github.com/docker-library/docker/commit/5645fda: Merge pull request https://github.com/docker-library/docker/pull/290 from Hades32/alpine-3.13
- https://github.com/docker-library/docker/commit/a2c3530: update to alpine 3.13

library/docker

@@ -4,42 +4,42 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/docker.git
 
-Tags: 20.10.2, 20.10, 20, latest
+Tags: 20.10.3, 20.10, 20, latest
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: 72ed002682df9e778da1fc8f0aa2ea1a0b9a3986
+GitCommit: ec5d64f9611da8f8b19c9c5c4acc04b9397174e6
 Directory: 20.10
 
-Tags: 20.10.2-dind, 20.10-dind, 20-dind, dind
+Tags: 20.10.3-dind, 20.10-dind, 20-dind, dind
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: 094faa88f437cafef7aeb0cc36e75b59046cc4b9
 Directory: 20.10/dind
 
-Tags: 20.10.2-dind-rootless, 20.10-dind-rootless, 20-dind-rootless, dind-rootless
+Tags: 20.10.3-dind-rootless, 20.10-dind-rootless, 20-dind-rootless, dind-rootless
 Architectures: amd64
-GitCommit: 72ed002682df9e778da1fc8f0aa2ea1a0b9a3986
+GitCommit: ec5d64f9611da8f8b19c9c5c4acc04b9397174e6
 Directory: 20.10/dind-rootless
 
-Tags: 20.10.2-git, 20.10-git, 20-git, git
+Tags: 20.10.3-git, 20.10-git, 20-git, git
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: 387e351394bfad74bceebf8303c6c8e39c3d4ed4
 Directory: 20.10/git
 
-Tags: 19.03.14, 19.03, 19
+Tags: 19.03.15, 19.03, 19
 Architectures: amd64, arm32v6, arm32v7, arm64v8
-GitCommit: c8b077bfbab07a33ba5c80e5d4987fba8bbdd67b
+GitCommit: 835c371c516ebdf67adc0c76bbfb38bf9d3e586c
 Directory: 19.03
 
-Tags: 19.03.14-dind, 19.03-dind, 19-dind
+Tags: 19.03.15-dind, 19.03-dind, 19-dind
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: b1d2628005e12e79079c025c3653cba248d6f264
 Directory: 19.03/dind
 
-Tags: 19.03.14-dind-rootless, 19.03-dind-rootless, 19-dind-rootless
+Tags: 19.03.15-dind-rootless, 19.03-dind-rootless, 19-dind-rootless
 Architectures: amd64
-GitCommit: c8b077bfbab07a33ba5c80e5d4987fba8bbdd67b
+GitCommit: 835c371c516ebdf67adc0c76bbfb38bf9d3e586c
 Directory: 19.03/dind-rootless
 
-Tags: 19.03.14-git, 19.03-git, 19-git
+Tags: 19.03.15-git, 19.03-git, 19-git
 Architectures: amd64, arm32v6, arm32v7, arm64v8
 GitCommit: 12d1c2763b54d29137ec448a3e4ad1a9aefae1a0
 Directory: 19.03/git