Add Readthedocs FAQ (PaddlePaddle#1007)

* add faq

* add faq

* readthedocs_faq

Co-authored-by: chenxiaozeng <[email protected]>
Co-authored-by: yingyibiao <[email protected]>

Author: 3 people

docs/index.rst

@@ -76,6 +76,12 @@
    如何贡献文档案例 <community/contribute_docs>
    如何加入兴趣小组 <community/join_in_PaddleNLP-SIG>
 
+.. toctree::
+   :maxdepth: 2
+   :caption: FAQ
+
+   FAQ <FAQ.md>
+
 .. toctree::
    :maxdepth: 2
    :caption: API Reference