chore(docs): update readme

README.md

@@ -187,7 +187,7 @@ You can change `0.0.0.0` to the intranet or public IP address to test the connec
    ```python
     from clip_client import Client
 
-    c = Client('grpc://demo-cas.jina.ai:51000')
+    c = Client('grpc://0.0.0.0:51000')
     ```
 3. To get sentence embedding:
     ```python    
@@ -245,14 +245,14 @@ da.plot_image_sprites()
 
 #### Encode images
 
-Start the server with `python -m clip_server`. Let's say it's at `demo-cas.jina.ai:51000` with `GRPC` protocol (you will get this information after running the server).
+Start the server with `python -m clip_server`. Let's say it's at `0.0.0.0:51000` with `GRPC` protocol (you will get this information after running the server).
 
 Create a Python client script:
 
 ```python
 from clip_client import Client
 
-c = Client(server='grpc://demo-cas.jina.ai:51000')
+c = Client(server='grpc://0.0.0.0:51000')
 
 da = c.encode(da, show_progress=True)
 ```
@@ -399,7 +399,7 @@ Now encode these 6,403 sentences, it may take 10 seconds or less depending on yo
 ```python
 from clip_client import Client
 
-c = Client('grpc://demo-cas.jina.ai:51000')
+c = Client('grpc://0.0.0.0:51000')
 
 r = c.encode(da, show_progress=True)
 ```
@@ -539,7 +539,7 @@ From `0.3.0` CLIP-as-service adds a new `/rank` endpoint that re-ranks cross-mod
 from clip_client import Client
 from docarray import Document
 
-c = Client(server='grpc://demo-cas.jina.ai:51000')
+c = Client(server='grpc://0.0.0.0:51000')
 r = c.rank(
     [
         Document(