New hugo build command and destination of static output

.drone.yml

@@ -3,10 +3,11 @@ name: default
 
 steps:
   - name: build
-    image: hugo
+    image: buster-slim
     commands:
       - wget https://github.com/gohugoio/hugo/releases/download/v0.62.1/hugo_0.62.1_Linux-64bit.deb -O hugo.deb
       - dpkg -i hugo.deb
+      - hugo --destination _site/
   
   - name: docker
     image: plugins/docker
@@ -19,10 +20,10 @@ steps:
         from_secret: DOCKER_PASSWORD
       tags: 
         - "${DRONE_BUILD_NUMBER}"
-        - "latest"
+        - "hugo"
     when:
       branch:
-        - master
+        - new
 
   - name: notify
     image: plugins/matrix