README: use modern style of badges

[CI SKIP]

README.md

@@ -1,5 +1,6 @@
-Gogs [![Build Status](https://travis-ci.org/gogs/gogs.svg?branch=master)](https://travis-ci.org/gogs/gogs) [![Build status](https://ci.appveyor.com/api/projects/status/b9uu5ejl933e2wlt/branch/master?svg=true)](https://ci.appveyor.com/project/Unknwon/gogs/branch/master) [![Crowdin](https://d322cqt584bo4o.cloudfront.net/gogs/localized.svg)](https://crowdin.com/project/gogs) [![Discord](https://img.shields.io/discord/382595433060499458.svg)](https://discord.gg/9aqdHU7)
-=====================
+# Gogs
+
+[![Build status](https://img.shields.io/travis/gogs/gogs/master.svg?style=for-the-badge&logo=travis)](https://travis-ci.org/gogs/gogs) [![Build status](https://img.shields.io/appveyor/ci/Unknwon/gogs?logo=appveyor&style=for-the-badge)](https://ci.appveyor.com/project/Unknwon/gogs/branch/master) ![![Docker Cloud build status](https://img.shields.io/docker/cloud/build/gogs/gogs?logo=docker&style=for-the-badge)](https://cloud.docker.com/u/gogs/repository/docker/gogs/gogs) [![Discord](https://img.shields.io/discord/382595433060499458.svg?style=for-the-badge&logo=discord)](https://discord.gg/9aqdHU7) [![Sourcegraph](https://img.shields.io/badge/view%20on-Sourcegraph-brightgreen.svg?style=for-the-badge&logo=sourcegraph)](https://sourcegraph.com/github.com/gogs/gogs)
 
 ![](https://github.com/gogs/gogs/blob/master/public/img/gogs-large-resize.png?raw=true)
 

README_ZH.md

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-Gogs [![Build Status](https://travis-ci.org/gogs/gogs.svg?branch=master)](https://travis-ci.org/gogs/gogs) [![Build status](https://ci.appveyor.com/api/projects/status/b9uu5ejl933e2wlt/branch/master?svg=true)](https://ci.appveyor.com/project/Unknwon/gogs/branch/master)
-=====================
+# Gogs
 
 Gogs 是一款极易搭建的自助 Git 服务。
 

docker/README.md

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 # Docker for Gogs
 
-Visit [Docker Cloud](https://cloud.docker.com/swarm/gogs/repository/docker/gogs/gogs) / [Docker Store](https://store.docker.com/community/images/gogs/gogs) see all available images and tags.
+![Docker pulls](https://img.shields.io/docker/pulls/gogs/gogs?logo=docker&style=for-the-badge) ![Docker image size](https://img.shields.io/microbadger/image-size/gogs/gogs?logo=docker&style=for-the-badge)
+
+Visit [Docker Cloud](https://cloud.docker.com/u/gogs/repository/docker/gogs/gogs) see all available images and tags.
 
 ## Usage