removed id_rsa from git

.drone.yml

@@ -7,14 +7,21 @@ trigger:
     - push
 
 steps:
-  - name: docker-build
-    image: plugins/docker
-    environment:
-      NGINX_KEY:
-        from_secret: NGINX_KEY
-
+  - name: key-setup
+    image: ubuntu:latest
+    volumes:
+      - name: wd
+        path: .
     commands:
       - echo "$NGINX_KEY" > id_rsa
+
+  - name: docker-build
+    image: plugins/docker
+    volumes:
+      - name: wd
+        path: .
+    depends_on:
+      - key-setup
     settings:
        dockerfile: Dockerfile
        context: .