Update push.yml

.github/workflows/push.yml

@@ -13,12 +13,13 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v2
 
-      - name: Getting Ready...
+      - name: Write SSH keys
         run: |
-          echo "Getting Ready..."
-          mkdir -p ~/.ssh/
-          echo "HOST *" > ~/.ssh/config
-          echo "StrictHostKeyChecking no" >> ~/.ssh/config
+          install -m 600 -D /dev/null ~/.ssh/id_rsa
+          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/id_rsa
+          host='host.example.com'
+          hosts="$(dig +short "$host" | grep -v '\.$' | sed -z 's|\n|,|g')$host"
+          ssh-keyscan -H "$hosts" > ~/.ssh/known_hosts
 
       - name: Pushing Files...
         run: |