update the doc enable trace profiling

Signed-off-by: Daxin Wang <[email protected]>

.github/workflows/deploy-production.yml

@@ -21,11 +21,12 @@ jobs:
 
       - uses: webfactory/[email protected]
         with:
-          ssh-private-key: ${{ secrets.WEBSITE_HOST_KEY }}
+          ssh-private-key: ${{ secrets.WEBSITE_PRIVATE_KEY }}
 
       - name: Build and Deploy
         env: 
           WEBSITE_HOST: ${{ secrets.WEBSITE_HOST }}
+          WEBSITE_HOST_KEY: ${{ secrets.WEBSITE_HOST_KEY }}
           WEBSITE_PATH: ${{ secrets.WEBSITE_PATH }}
         run: |
           # Set the real domain
@@ -35,8 +36,7 @@ jobs:
           # Compress and transfer the tarball
           cd public && tar -cvzf public.tar.gz *
           # Add the host key
-          hostKey='kindlingx.com ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIfN3rkIrcVwFzs1oRYQ+pmyHmNbRWvikxRl7pRPVL/2'
-          echo "$hostKey" >> ~/.ssh/known_hosts
+          echo $WEBSITE_HOST_KEY >> ~/.ssh/known_hosts
           scp public.tar.gz "$WEBSITE_HOST":$WEBSITE_PATH/..
 
           # Update the website

content/en/docs/usage/enable-trace-profiling.md

@@ -15,7 +15,7 @@ toc: true
 
 ## Prerequisites
 - This feature only works on the Linux kernel 4.17 or newer.
-- We recommend that users install the SkyWalking agent of Java before enabling trace profiling for full features supported.
+- We recommend that users install **SkyWalking with the backend** and its Java agent before enabling trace profiling for full features supported. Otherwise, only the "thread profiling" is enabled and you will see the prompt "No skywalking is installed".
 
 ## Instructions
 > If you have not installed the Kindling agent, please do it first before you follow the instructions. See the [Installation](/docs/installation/kindling-agent/requirements) for how to install.