docs: Update the BentoCloud doc (#2809)

Signed-off-by: Sherlock113 <[email protected]>

website/docs/quick-start/installation/bentoml/bentofile.yaml

@@ -9,4 +9,6 @@ docker:
   system_packages:
     - unzip
     - git
+    - curl
+    - software-properties-common
   setup_script: "./setup-docker.sh"

website/docs/quick-start/installation/bentoml/index.md

@@ -42,6 +42,8 @@ docker:
     system_packages:
         - unzip
         - git
+        - curl
+        - software-properties-common
     setup_script: "./setup-docker.sh"
 ```
 
@@ -97,7 +99,7 @@ class Tabby:
         self.server.wait_until_ready()
 ```
 
-Finally, we draft a deployment configuration file `bentodeploy.yaml` to outline the deployment specifics. Note that we employ rclone to synchronize persisted data with object storage.
+Finally, we draft a deployment configuration file `bentodeploy.yaml` to outline the deployment specifics. Note that we employ rclone to synchronize persisted data with Cloudflare R2 object storage. You can get the values of the following R2 environment variables by referring to the [Cloudfare R2 documentation](https://developers.cloudflare.com/r2/api/s3/tokens/).
 
 ```yaml title="bentodeploy.yaml"
 name: tabby-local

website/docs/quick-start/installation/bentoml/service.py

@@ -73,6 +73,7 @@ def __init__(self) -> None:
 
 def download_tabby_dir(username: str) -> None:
     """Download the tabby directory for the given user."""
+    # Ensure the bucket `tabby-cloud-managed` and the path `users/tabby-local` exist in your R2 storage
     if os.system(f"rclone sync r2:/tabby-cloud-managed/users/{username} ~/.tabby") == 0:
         print("Tabby directory downloaded successfully.")
     else: