Update .drone.yml

.drone.yml

@@ -3,6 +3,21 @@ type: docker
 name: default
 
 steps:
+  - name: build
+    image: plugins/docker
+    settings:
+      repo: sthopeless/my-nginx-website
+      tags:
+        - latest
+        - ${DRONE_COMMIT_SHA}
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+      dockerfile: Dockerfile
+      dry_run: true
+      purge: true
+
   - name: publish
     image: plugins/docker
     settings:
@@ -14,6 +29,9 @@ steps:
         from_secret: docker_username
       password:
         from_secret: docker_password
+      dockerfile: Dockerfile
+      dry_run: true
+      purge: true
     when:
       event:
         - push