Revert to ssh-agent

.gitea/workflows/unittests.yml

@@ -41,10 +41,9 @@ jobs:
       NODES: "192.168.15.160"
     steps:
     - uses: actions/checkout@v4
-    - name: ssh key
-      run: |
-        echo "${{ secrets.SSH_MASTER_KEY }}" > ~/.ssh/id_ed25519
-        chmod 600 ~/.ssh/id_ed25519
+    - uses: webfactory/ssh-agent@v0.9.1
+      with:
+        ssh-private-key: ${{ secrets.SSH_MASTER_KEY }}
     - name: deploy
       run: |
         # echo LS1
@@ -63,8 +62,3 @@ jobs:
           ssh root@$NODE systemctl restart node-api
         done
     
-    # - name: Clean up
-    #   run: |
-    #     rm -f ~/.ssh/id_ed25519
-    #   if: always()
-