[CI/Build] refactor dockerfile & fix pip cache

[CI/Build] fix pip cache with vllm_nccl & refactor dockerfile to build wheels (#3859)

docs/source/conf.py

@@ -11,13 +11,10 @@
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 
 import logging
-import os
 import sys
 
 from sphinx.ext import autodoc
 
-sys.path.insert(0, os.path.abspath(os.path.join('..', '..')))
-
 logger = logging.getLogger(__name__)
 
 # -- Project information -----------------------------------------------------