极狐ARM安装包相关文档（含trouble-shooting）

Problem to solve

As issues are solved for our ARM packages in #859 (closed), but we need to provide documentations, especially trouble-shooting part.

Solution

1. Translate upstream ARM document @shuangzhang @zhaoqi
2. Provide what we changed in redis settings to TWs in below comments @shreychen
3. Provide what we changed in rails settings to TWs in below comments @songhuang

/cc @TomHeng help review the documents