switch to kaniko plugin

.drone.yml

@@ -10,16 +10,12 @@ steps:
   - go test ./...
 
 - name: publish
-  image: plugins/docker:latest
+  image: garionion/drone-kaniko
   settings:
-    auto_tag: true
-    auto_tag_suffix: linux-amd64
-    daemon_off: false
-    debug: true
-    privileged: true
-    dockerfile: Dockerfile
-    password:
-      from_secret: docker_password
     repo: garionion/drone-yaml-server
     username:
-      from_secret: docker_username
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+    tags:
+      - latest