[Docs] Add brief installation steps in README for copy&paste. (open-m…

…mlab#755)

* [Docs] Add breif installation code for copy&paste.

* minor fix

README.md

@@ -77,7 +77,19 @@ Please refer to [changelog.md](docs/en/changelog.md) for more details and other
 
 ## Installation
 
-Please refer to [install.md](https://mmclassification.readthedocs.io/en/latest/install.html) for installation and dataset preparation.
+Below are quick steps for installation:
+
+```shell
+conda create -n open-mmlab python=3.8 pytorch=1.10 cudatoolkit=11.3 torchvision -c pytorch -y
+conda activate open-mmlab
+pip3 install openmim
+mim install mmcv-full
+git clone https://github.com/open-mmlab/mmclassification.git
+cd mmclassification
+pip3 install -e .
+```
+
+Please refer to [install.md](https://mmclassification.readthedocs.io/en/latest/install.html) for more detailed installation and dataset preparation.
 
 ## Getting Started
 

README_zh-CN.md

@@ -75,7 +75,19 @@ MMClassification 是一款基于 PyTorch 的开源图像分类工具箱，是 [O
 
 ## 安装
 
-请参考 [安装指南](https://mmclassification.readthedocs.io/zh_CN/latest/install.html) 进行安装
+以下是安装的简要步骤：
+
+```shell
+conda create -n open-mmlab python=3.8 pytorch=1.10 cudatoolkit=11.3 torchvision -c pytorch -y
+conda activate open-mmlab
+pip3 install openmim
+mim install mmcv-full
+git clone https://github.com/open-mmlab/mmclassification.git
+cd mmclassification
+pip3 install -e .
+```
+
+更详细的步骤请参考 [安装指南](https://mmclassification.readthedocs.io/zh_CN/latest/install.html) 进行安装。
 
 ## 基础教程