enable gcr and heroku plugins

.drone.yml

@@ -3,21 +3,36 @@ workspace:
   path: src/github.com/drone-plugins/drone-docker
 
 pipeline:
-  test:
-    image: golang:1.6
-    environment:
-      - CGO_ENABLED=0
-    commands:
-      # Disabled: main.go:99: cli.StringSlice composite literal uses unkeyed fields
-      # - go vet
-      - go test -cover -coverprofile=coverage.out
-      - go build -ldflags "-s -w -X main.build=$DRONE_BUILD_NUMBER" -a -tags netgo
+  build:
+    image: golang:1.9
+    commands: sh .drone.sh
 
   publish:
     image: plugins/docker
     repo: plugins/docker
     tags: [ "latest", "17", "17.05" ]
     secrets: [ docker_username, docker_password ]
+    dockerfile: docker/Dockerfile
+    when:
+      branch: master
+      event: push
+
+  publish_heroku:
+    image: plugins/docker
+    repo: plugins/heroku
+    tags: [ "latest", "17", "17.05" ]
+    secrets: [ docker_username, docker_password ]
+    dockerfile: docker/heroku/Dockerfile
+    when:
+      branch: master
+      event: push
+
+  publish_gcr:
+    image: plugins/docker
+    repo: plugins/gcr
+    tags: [ "latest", "17", "17.05" ]
+    secrets: [ docker_username, docker_password ]
+    dockerfile: docker/gcr/Dockerfile
     when:
       branch: master
       event: push