[skywalking-python] branch doc/build updated: Update doc "how to build from source"

[ke...@apache.org]

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kezhenxu94 pushed a commit to branch doc/build
in repository https://gitbox.apache.org/repos/asf/skywalking-python.git


The following commit(s) were added to refs/heads/doc/build by this push:
     new a1938f5  Update doc "how to build from source"
a1938f5 is described below

commit a1938f5490510054859dca5a451bb368622360c8
Author: kezhenxu94 <ke...@apache.org>
AuthorDate: Fri Dec 25 11:59:58 2020 +0800

    Update doc "how to build from source"
---
 docs/FAQ.md | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/docs/FAQ.md b/docs/FAQ.md
index 175d989..57df285 100644
--- a/docs/FAQ.md
+++ b/docs/FAQ.md
@@ -14,7 +14,15 @@ you can also disable the plugins via environment variables `SW_AGENT_DISABLE_PLU
 
 #### Q: How to build from sources?
 
-#### A: If you want to build the SkyWalking Python Agent from source codes, for some reasons, for example, you want to try the latest features that're not released yet, please clone the source codes from GitHub and `make install` it:
+#### A: Download the source tar from [the official website](http://skywalking.apache.org/downloads/), and run the following commands to build from source
+
+```shell
+$ tar -zxf skywalking-python-src-<version>.tgz
+$ cd skywalking-python-src-<version>
+$ make install
+```
+
+If you want to build from the latest source codes from GitHub, for some reasons, for example, you want to try the latest features that are not released yet, please clone the source codes from GitHub and `make install` it:
 
 ```shell
 git clone https://github.com/apache/skywalking-python
@@ -23,4 +31,4 @@ git submodule update --init
 make install
 ``` 
 
-**NOTE** that if you download the source codes (`.tgz`) from our official website, simply run `make install` without `git submodule update --init` because the submodules are packaged in the tar.
+**NOTE** that only releases from [the website](http://skywalking.apache.org/downloads/) are official Apache releases.