Add an entry in Debugging section (#481)

### What problem does this PR solve?

_Add an entry in Debugging section._

### Type of change

- [x] Documentation Update

---------

Co-authored-by: Yingfeng <[email protected]>

docs/faq.md

@@ -78,7 +78,16 @@ docker build -t infiniflow/ragflow:v0.3.0 . --network host
 
 ### 2. Issues with huggingface models.
 
-#### 2.1. `MaxRetryError: HTTPSConnectionPool(host='hf-mirror.com', port=443)`
+#### 2.1 If https://huggingface.co can not be accessed
+ - If RAGflow is installed by docker, it will automatically download the OCR and embedding modules from Huggingface website (https://huggingface.co).
+ - If your computer can not access https://huggingface.co, such error will appear and PDF file parsing will fail
+   - FileNotFoundError: [Errno 2] No such file or directory: '/root/.cache/huggingface/hub/models--InfiniFlow--deepdoc/snapshots/be0c1e50eef6047b412d1800aa89aba4d275f997/ocr.res'  
+ - if your computer can access https://hf-mirror.com
+   - cd ragflow-0.3.0/docker/; docker compose down
+   - replace https://huggingface.co with https://hf-mirror.com in the ragflow-0.3.0/docker/docker-compose.yml
+   - docker compose up -d
+
+#### 2.2. `MaxRetryError: HTTPSConnectionPool(host='hf-mirror.com', port=443)`
 
 This error suggests that you do not have Internet access or are unable to connect to hf-mirror.com. Try the following: 
 
@@ -88,7 +97,7 @@ This error suggests that you do not have Internet access or are unable to connec
 - ~/deepdoc:/ragflow/rag/res/deepdoc
 ```
 
-#### 2.2 `FileNotFoundError: [Errno 2] No such file or directory: '/root/.cache/huggingface/hub/models--InfiniFlow--deepdoc/snapshots/FileNotFoundError: [Errno 2] No such file or directory: '/ragflow/rag/res/deepdoc/ocr.res'be0c1e50eef6047b412d1800aa89aba4d275f997/ocr.res'`
+#### 2.3 `FileNotFoundError: [Errno 2] No such file or directory: '/root/.cache/huggingface/hub/models--InfiniFlow--deepdoc/snapshots/FileNotFoundError: [Errno 2] No such file or directory: '/ragflow/rag/res/deepdoc/ocr.res'be0c1e50eef6047b412d1800aa89aba4d275f997/ocr.res'`
 
 1. Check your network from within Docker, for example: 
 ```bash
@@ -165,7 +174,7 @@ If your RAGFlow is deployed *locally*, try the following:
 ```bash
 docker logs -f ragflow-server
 ```
-2. Check if the **tast_executor.py** process exist.
+2. Check if the **task_executor.py** process exist.
 3. Check if your RAGFlow server can access hf-mirror.com or huggingface.com.
 
 
@@ -304,7 +313,6 @@ You limit what the system responds to what you specify in **Empty response** if
 
 ![](https://github.com/infiniflow/ragflow/assets/93570324/8cfb6fa4-8a97-415d-b9fa-b6f405a055f3)
 
-
 ### 4. How to run RAGFlow with a locally deployed LLM?
 
 You can use Ollama to deploy local LLM. See [here](https://github.com/infiniflow/ragflow/blob/main/docs/ollama.md) for more information.