update README: reorder FlagOS and model download steps

README.md

@@ -67,18 +67,18 @@ FlagEval (Libra)** is a comprehensive evaluation system and open platform for la
 
 ## Operation Steps
 
-### Download Open-source Model Weights
+### Download FlagOS Image
 
 ```bash
-pip install modelscope
-modelscope download --model OpenBMB/MiniCPM-V-4 --local_dir /share/models/MiniCPM-V-4
-
+docker pull harbor.baai.ac.cn/flagrelease-public/flagrelease_nvidia_minicpmv4
 ```
 
-### Download FlagOS Image
+### Download Open-source Model Weights
 
 ```bash
-docker pull harbor.baai.ac.cn/flagrelease-public/flagrelease_nvidia_minicpmv4
+pip install modelscope
+modelscope download --model OpenBMB/MiniCPM-V-4 --local_dir /share/models/MiniCPM-V-4
+
 ```
 
 ### Start the inference service
@@ -95,7 +95,6 @@ flagscale serve minicpm_v_4
 
 ```
 
-
 ## Service Invocation
 
 ### API-based Invocation Script
@@ -150,7 +149,6 @@ We warmly welcome global developers to join us:
 3. Improve technical documentation
 4. Expand hardware adaptation support
 
-
 # License
 
 本模型的权重来源于OpenBMB/MiniCPM-V-4，以apache2.0协议https://www.apache.org/licenses/LICENSE-2.0.txt开源。