Print version when RAGFlow server startup (#3393)

### What problem does this PR solve?

Print version when RAGFlow server startup

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Signed-off-by: jinhai <haijin.chn@gmail.com>
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

README.md

@@ -274,7 +274,7 @@ git clone https://github.com/infiniflow/ragflow.git
 cd ragflow/
 pip3 install huggingface-hub nltk
 python3 download_deps.py
-docker build -f Dockerfile.slim -t infiniflow/ragflow:dev-slim .
+build_docker_image.sh slim
 ```
 
 ## 🔧 Build a Docker image including embedding models
@@ -286,7 +286,7 @@ git clone https://github.com/infiniflow/ragflow.git
 cd ragflow/
 pip3 install huggingface-hub nltk
 python3 download_deps.py
-docker build -f Dockerfile -t infiniflow/ragflow:dev .
+build_docker_image.sh full
 ```
 
 ## 🔨 Launch service from source for development