add index_en.rst

doc/v2/build_and_install/index_en.rst

+install and compile
+==========
+
+.. _install_steps:
+
+PaddlePaddle provides various ways of installation for many different users
+
+focus on deep learning model development
+-----------------
+
+PaddlePaddle provides lots of packages of python wheel , that pip can install:
+
+.. toctree::
+	:maxdepth: 1
+
+	pip_install_cn.rst
+
+this is the convenient way to install it , please choose the right installation package with mochine configure and system。
+
+follow the bottom frame
+----------
+
+PaddlePaddle provides the installation ways of Docker, please follow the tutorial:
+
+.. toctree::
+	:maxdepth: 1
+
+	docker_install_cn.rst
+
+we recommend running PaddlePaddle in docker , this way has more superiority ：
+
+- don't need the third dependent of installing 
+- easy to shared runtime environment and the problem recurrented
+
+we provides compile and install method of PaddlePaddle from resouce code ， for users with customized binary file：
+
+.. toctree::
+    :maxdepth: 1
+
+    build_from_source_cn.rst
+
+.. warning::
+
+	what need to be attation to , this way of installation involves to download、 compile and install the third depentent , The whole process of installing need more time。
+
+
+FAQ
+-----------
+
+if you have any problem on the process of installation , please trying the bottom page to find the answer：
+
+:ref:`常见问题解答 <install_faq>`
+
+if the problem hasn't been solved , so welcome to come the paddlepaddle community to feedback：
+
+`创建issue <https://github.com/PaddlePaddle/Paddle/issues/new>`_