doc:refactor install document and application document

docs/getting_started/faq/deploy/deploy_faq.md

@@ -0,0 +1,33 @@
+Installation FAQ
+==================================
+
+
+##### Q1: execute `pip install -r requirements.txt` error, found some package cannot find correct version.
+change the pip source.
+
+```bash
+# pypi
+$ pip install -r requirements.txt -i https://pypi.python.org/simple
+```
+
+or
+
+```bash
+# tsinghua
+$ pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple/
+```
+
+or
+
+```bash
+# aliyun
+$ pip install -r requirements.txt -i http://mirrors.aliyun.com/pypi/simple/
+```
+
+##### Q2: sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) unable to open database file 
+
+make sure you pull latest code or create directory with mkdir pilot/data
+
+##### Q3: The model keeps getting killed.
+your GPU VRAM size is not enough, try replace your hardware or replace other llms.
+