Fix .drone.yml

.drone.yml

@@ -28,9 +28,9 @@ steps:
         from_secret: ssh_key
     commands:
       - mkdir $HOME/.ssh
-      - echo "$SSH_KEY" > $HOME/.ssh/id_ed25519
+      - echo "$$SSH_KEY" > $HOME/.ssh/id_ed25519
       - chmod 600 $HOME/.ssh/id_ed25519
-      - scp -o "StrictHostKeyChecking no" -P ${SSH_PORT} -r /data/public ${SSH_USER}@${SSH_HOST}:docker/nginx/website
+      - scp -o "StrictHostKeyChecking no" -P $$SSH_PORT -r /data/public $$SSH_USER@$$SSH_HOST:docker/nginx/website
 
 volumes:
   - name: data