Update drone config file

.drone.yml

@@ -1,12 +1,19 @@
-workspace:
-  base: /go
-  path: src/github.com/drone-plugins/drone-terraform
-
-pipeline:
-  test:
-    image: golang:1.9
+kind: pipeline
+type: kubernetes
+name: default
+steps:
+  - name: docker
+    image: plugins/docker
     environment:
-      - CGO_ENABLED=0
-    commands:
-      - go test -cover -coverprofile=coverage.out
-      - go build -ldflags "-s -w -X main.revision=$(git rev-parse HEAD)" -a
+      DRONE_REPO_BRANCH: master
+    settings:
+      repo: porto.interlegis.leg.br/seit/drone-terraform
+      registry: porto.interlegis.leg.br
+      mirror: https://registrycache.interlegis.leg.br
+      pull: if-not-exists
+      dockerfile: docker/Dockerfile
+      auto_tag: true
+      username:
+        from_secret: porto_user
+      password:
+        from_secret: porto_pw