Update readme

Author: winlinvip

README.md

@@ -13,7 +13,7 @@ SRS is a RTMP/HLS/WebRTC/SRT/GB28181 streaming cluster, high efficiency, stable
 <a name="product"></a>
 ## Usage
 
-**Step 1:** Get SRS.
+**>>> Step 1:** Get SRS.
 
 ```
 git clone https://gitee.com/winlinvip/srs.oschina.git srs &&
@@ -22,7 +22,7 @@ cd srs/trunk && git remote set-url origin https://github.com/ossrs/srs.git && gi
 
 > Note: We use [mirrors(gitee)](#mirrors) here, but it's also ok to directly clone by `git clone https://github.com/ossrs/srs.git && cd srs/trunk`
 
-**Step 2:** Build SRS.
+**>>> Step 2:** Build SRS.
 
 ```
 ./configure && make
@@ -38,16 +38,16 @@ cd srs/trunk && git remote set-url origin https://github.com/ossrs/srs.git && gi
 ./objs/srs -c conf/srs.conf
 ```
 
-**Whatever**, you can also directly run SRS in [docker][docker-srs3]:
+**>>> Whatever**, you can also directly run SRS in [docker][docker-srs3]:
 
 ```
 docker run -p 1935:1935 -p 1985:1985 -p 8080:8080 \
     registry.cn-hangzhou.aliyuncs.com/ossrs/srs:3
 ```
 
-> Note: Again, we use [ACR](https://cr.console.aliyun.com/) here, you can directly use `docker run -p 1935:1935 -p 1985:1985 -p 8080:8080 ossrs/srs:3` instead.
+> Note: Again, we use [ACR](https://cr.console.aliyun.com/) here, you can directly run in docker hub by `docker run -p 1935:1935 -p 1985:1985 -p 8080:8080 ossrs/srs:3`
 
-**From here,** strongly recommend to read bellow wikis:
+**>>> From here,** strongly recommend to read bellow wikis:
 
 * Usage: How to delivery RTMP?([CN][v1_CN_SampleRTMP], [EN][v1_EN_SampleRTMP])
 * Usage: How to delivery RTMP Edge Cluster?([CN][v3_CN_SampleRTMPCluster], [EN][v3_EN_SampleRTMPCluster])