Update readme.

Author: ghosind

README-CN.md

@@ -89,6 +89,13 @@ dvm upgrade
 - unzip (Deno v0.36.0及更新的版本)
 - gunzip (Deno v0.35.0及更旧的版本)
 
+若需要从源码安装Deno，请确保以下依赖软件已经安装：
+
+- rustc
+- cargo
+- cc
+- cmake
+
 ## DVM入门
 
 ### 列出已安装的版本
@@ -118,6 +125,14 @@ dvm install v1.0.0
 dvn install v0.42.0
 ```
 
+### 源码安装
+
+DVM v0.8.0及以上版本支持从源码安装Deno：
+
+```sh
+dvm install --from-source v1.35.0
+```
+
 ### 删除版本
 
 使用`dvm uninstall <version>`卸载指定版本：
@@ -179,6 +194,7 @@ DVM支持的命令包括有：
 | | `dvm install <version>` | 下载并安装指定的版本 |
 | | `dvm install <version> --registry=<registry>` | 通过指定的镜像下载deno |
 | | `dvm install <version> --skip-validation` | 下载deno前不对版本进行校验 |
+| | `dvm install <version> --from-source` | 编译源码并安装Deno |
 | `uninstall` | `dvm uninstall <version>` | 卸载指定的版本 |
 | `use` | `dvm use` | 将指定的版本设置为当前使用的版本，未指定版本将从当前目录下的`.dvmrc`文件中读取 |
 | | `dvm use <version>` | 将指定的版本设置为当前使用的版本 |

README.md

@@ -18,7 +18,7 @@ For Windows users, you must install DVM v0.7.0 or later versions, and also need
    - [Installation](#installation)
    - [Upgrade DVM](#upgrade-dvm)
 - [Prerequirement](#prerequirement)
-- [Getting Start](#getting-start)
+- [Getting Started](#getting-started)
   - [List available versions](#list-available-versions)
   - [List installed versions](#list-installed-versions)
   - [Install Deno](#install-deno)
@@ -89,7 +89,14 @@ Please make sure you have required dependencies installed:
 - unzip (for Deno v0.36.0 and newer versions)
 - gunzip (for Deno v0.35.0 and lower versions)
 
-## Getting Start
+For installing Deno from source, please make sure you have required dependencies installed:
+
+- rustc
+- cargo
+- cc
+- cmake
+
+## Getting Started
 
 After installed dvm, you can use it to manage multiple version Deno environments.
 
@@ -129,6 +136,14 @@ dvm install v0.42.0
 # Using deno v1.0.0 now.
 ```
 
+### Install Deno from source
+
+Since DVM v0.8.0, you can install Deno from source with `--from-source` option.
+
+```sh
+dvm install --from-source v1.35.0
+```
+
 ### Uninstall Deno
 
 Use `dvm uninstall <version|alias-name>` command to uninstall a specified version.
@@ -219,6 +234,7 @@ DVM supported the following commands:
 | | `dvm install <version>` | Download and install the specified version from source. |
 | | `dvm install <version> --registry=<registry>` | Download and install deno with the specified registry. |
 | | `dvm install <version> --skip-validation` | Do not validate deno version before trying to download it. |
+| | `dvm install <version> --from-source` | Build and install Deno from source code. |
 | `uninstall` | `dvm uninstall <version>` | Uninstall the specified version. |
 | `use` | `dvm use` | Use the specified version read from .dvmrc. |
 | | `dvm use <version>` | Use the specified version that passed by argument. |