Update readme.

Author: ghosind

README.md

@@ -1,25 +1,102 @@
 # DVM - Deno Version Manager
 
-![](https://github.com/ghosind/dvm/workflows/shellcheck/badge.svg)
+![shellcheck](https://github.com/ghosind/dvm/workflows/shellcheck/badge.svg)
 
 Dvm is a nvm-like version manager for [Deno](https://deno.land/).
 
-## Usage
+## Installation
 
-Use `install <version>` command to download and install a specified version from the source.
+There are two ways to install dvm now:
 
+1. Install dvm from network via following command:
+
+```sh
+$ curl -o- https://raw.githubusercontent.com/ghosind/dvm/master/install.sh | bash
+```
+
+2. Download and extract release zip, and execute `install.sh` script to install dvm:
+
+```sh
+Download/dvm $ ./install.sh
+```
+
+## Getting Start
+
+After installed dvm, you can use it to manage 
+
+Use `dvm install <version>` command to download and install a specified version from the source.
+
+```sh
+$ dvm install v1.0.0
+$ dvn install v0.42.0
+```
+
+Use `dvm uninstall <version>` command to uninstall a specified version.
+
+```
+$ dvm uninstall v0.39.0
+$ dvm uninstall v1.0.0-rc
+```
+
+Use `dvm use [version]` command to link `deno` to the specified version by parameter or `.dvmrc` file.
+
+```sh
+# use v1.0.0
+$ dvm use v1.0.0
+
+# get version from .dvmrc file
+# $ cat .dvmrc
+# # v1.0.0
+$ dvm use
 ```
-dvm install v1.0.0
-dvn install v0.42.0
+
+Use `dvm current` command to display the current version of deno.
+
+```sh
+$ dvm current
+# v1.0.0
+```
+
+Use `dvm ls` command to list all installed versions, and use `dvm ls-remote` to list all available versions from remote.
+
+```sh
+# list all installed versions
+$ dvm ls
+# list is an alias for ls command
+$ dvm list
+
+# list all available versions
+$ dvm ls-remote
+# list-remote is an alias for ls-remote command
+$ dvm list-remote
 ```
 
-Use `uninstall <version>` command to uninstall a specified version.
+## Uninstalling dvm
 
+You can execute following command to uninstall dvm:
+
+```sh
+rm -rf "$DVM_DIR"
 ```
-dvm uninstall v0.39.0
-dvm uninstall v1.0.0-rc
+
+Edit shell config file (like `.bashrc` or `.zshrc`), and remove the following lines:
+
+```sh
+# Deno Version Manager
+export DVM_DIR="$HOME/.dvm"
+export DVM_BIN="$DVM_DIR/bin"
+export PATH="$PATH:$DVM_BIN"
+[ -f "$DVM_DIR/dvm.sh" ] && alias dvm="$DVM_DIR/dvm.sh"
 ```
 
+## Contribution
+
+1. Fork dvm project. ([https://github.com/ghosind/dvm](https://github.com/ghosind/dvm))
+2. Create your Branch. (`git checkout -b features/someFeatures`)
+3. Commit your Changes. (`git commit -m 'Add some features'`)
+4. Push to the Branch. (`git push origin features/someFeatures`)
+5. Create a new Pull Request.
+
 ## License
 
 Distributed under the MIT License. See LICENSE file for more information.