为docker构建添加FFmpeg依赖 (#1807)

* Test: change dockerfile to install ffmpeg

* Add the ffmpeg to dockerfile (required by edge-tts)

docs/GithubAction+NoLocal+Vectordb

@@ -19,6 +19,9 @@ RUN pip3 install transformers protobuf langchain sentence-transformers  faiss-cp
 RUN pip3 install unstructured[all-docs] --upgrade
 RUN python3  -c 'from check_proxy import warm_up_vectordb; warm_up_vectordb()'
 
+# edge-tts需要的依赖
+RUN apt update && apt install ffmpeg -y
+
 # 可选步骤，用于预热模块
 RUN python3  -c 'from check_proxy import warm_up_modules; warm_up_modules()'