更新 'README.md'

README.md

 >
 > Last Updates: 2020/12/02
 
-Brief Introduction
+# Brief Introduction
 For RNA-seq data, from bams to AS Information files.
 
-Requirements
+# Requirements
 choppy
 Ali-Cloud
 Linux
 # 激活choppy环境
+```
 $ source activate choppy (open-choppy-env)
 
 # 第一次安装
+```
 $ choppy install chenqingwang/RNAseq-alignment
 # 非第一次安装
+```
 $ choppy install chenqingwang/RNAseq-alignment -f 
 
 # 查询已安装APP
+```
 $ choppy apps
-Quick Start
+
+# Quick Start
+```
 # 准备 samples.csv 文件
 $ choppy samples chenqingwang/RNAseq-alignment-latest > samples.csv
 # 准备无默认参数的samples.csv 文件