Add the commands of run tests (apache#33)

Add the commands of run tests for both English and Chinese docs.

_docs/en/build/compile-by-docker.md

@@ -10,22 +10,40 @@ version: master
 Pegasus encapsulates the building environments into [docker images](https://hub.docker.com/r/apache/pegasus/tags?page=1&name=env), you can build directly based on these environments.
 
 For example, you can use the image based on `Ubuntu 20.04`:
-```sh
+```bash
 docker pull apache/pegasus:build-env-ubuntu2004
 ```
 
 ## Compilation
 
 Please refer to [Downloads](/docs/downloads) to fetch the sources under a directory (`/your/local/apache-pegasus-source`). Then run the following command:
 
-```sh
+If you want to run tests, you should build Pegasus by the following command:
+
+```bash
+docker run -v /your/local/apache-pegasus-source:/root/pegasus \
+           apache/pegasus:build-env-ubuntu2004 \
+           /bin/bash -c "cd /root/pegasus; ./run.sh build --test -c --clear_thirdparty -j $(nproc)"
+```
+
+If you want to build Pegasus without runing tests, just execute the following command:
+
+```bash
 docker run -v /your/local/apache-pegasus-source:/root/pegasus \
            apache/pegasus:build-env-ubuntu2004 \
            /bin/bash -c "cd /root/pegasus; ./run.sh build -c --clear_thirdparty -j $(nproc)"
 ```
 
 The output of compilation will be placed under `build/latest/output/` of the source directory. It includes `bin`, `include` and `lib`.
 
+## Run tests
+
+```bash
+docker run -v /your/local/apache-pegasus-source:/root/pegasus \
+           apache/pegasus:build-env-ubuntu2004 \
+           /bin/bash -c "cd /root/pegasus; ./run.sh test"
+```
+
 ## Packaging
 
 Package server binaries for deployment:

_docs/en/build/compile-from-source.md

@@ -24,12 +24,26 @@ You can refer to the docker images to install dependencies and set environment v
 
 Please refer to [Downloads](/docs/downloads) to fetch the sources。
 
+If you want to run tests, you should build Pegasus by the following command:
+
+```bash
+./run.sh build --test -c --clear_thirdparty -j $(nproc)
+```
+
+If you want to build Pegasus without runing tests, just execute the following command:
+
 ```bash
 ./run.sh build -c --clear_thirdparty -j $(nproc)
 ```
 
 The output of compilation will be placed under `build/latest/output/` of the source directory. It includes `bin`, `include` and `lib`.
 
+## Run tests
+
+```bash
+./run.sh test
+```
+
 ## Packaging
 
 Package server binaries for development:

_docs/zh/build/compile-by-docker.md

@@ -12,22 +12,40 @@ Pegasus将编译环境封装至[Docker镜像](https://hub.docker.com/r/apache/pe
 
 比如，你可以使用基于`Ubuntu 20.04`的镜像：
 
-```sh
+```bash
 docker pull apache/pegasus:build-env-ubuntu2004
 ```
 
 ## 编译
 
 请先参考[下载文档](/docs/downloads)获取源码到某目录（`/your/local/apache-pegasus-source`）下。随后运行以下命令：
 
-```sh
+如果你想要执行测试程序，需要用如下命令来编译Pegasus：
+
+```bash
+docker run -v /your/local/apache-pegasus-source:/root/pegasus \
+           apache/pegasus:build-env-ubuntu2004 \
+           /bin/bash -c "cd /root/pegasus; ./run.sh build --test -c --clear_thirdparty -j $(nproc)"
+```
+
+如果不需要执行测试程序，只是单纯想编译Pegasus，使用如下命令即可：
+
+```bash
 docker run -v /your/local/apache-pegasus-source:/root/pegasus \
            apache/pegasus:build-env-ubuntu2004 \
            /bin/bash -c "cd /root/pegasus; ./run.sh build -c --clear_thirdparty -j $(nproc)"
 ```
 
 编译的结果会被放在项目根目录的`build/latest/output/`文件夹下，其中包含`bin`、`include`以及`lib`目录。
 
+## 执行测试程序
+
+```bash
+docker run -v /your/local/apache-pegasus-source:/root/pegasus \
+           apache/pegasus:build-env-ubuntu2004 \
+           /bin/bash -c "cd /root/pegasus; ./run.sh test"
+```
+
 ## 编译打包
 
 打包server端程序包，用于服务部署：

_docs/zh/build/compile-from-source.md

@@ -26,12 +26,24 @@ version: master
 
 请先参考[下载文档](/docs/downloads)获取源码。
 
+如果你想要执行测试程序，需要用如下命令来编译Pegasus：
+```bash
+./run.sh build --test -c --clear_thirdparty -j $(nproc)
+```
+
+如果不需要执行测试程序，只是单纯想编译Pegasus，使用如下命令即可：
 ```bash
 ./run.sh build -c --clear_thirdparty -j $(nproc)
 ```
 
 编译后输出会放在当前目录的`build/latest/output/`目录下，里面包含`bin`、`include`以及`lib`目录。
 
+## 执行测试程序
+
+```bash
+./run.sh test
+```
+
 ## 编译打包
 
 打包server端程序包，用于服务部署：