CI: deploy only on tag

.drone.yml

@@ -1,19 +1,72 @@
 ---
 kind: pipeline
 type: kubernetes
+name: build
+platform:
+  os: linux
+  arch: amd64
+
+steps:
+- name: formatting-check
+  image: golang
+  commands:
+  - test -z $(gofmt -l .)
+- name: build
+  image: docker:dind
+  volumes:
+  - name: dockersock
+    path: /var/run
+  commands:
+  - docker build -f Dockerfile .
+
+services:
+- name: docker
+  image: docker:dind
+  privileged: true
+  volumes:
+  - name: dockersock
+    path: /var/run
+
+volumes:
+- name: dockersock
+  temp: {}
+---
+kind: pipeline
+type: kubernetes
 name: deploy
 platform:
   os: linux
   arch: amd64
 
 steps:
-- name: build
-  image: docker
+- name: deploy
+  image: docker:dind
   environment:
     DOCKER_USERNAME:
       from_secret: DOCKER_USERNAME
     DOCKER_PASSWORD:
       from_secret: DOCKER_PASSWORD
+  volumes:
+  - name: dockersock
+    path: /var/run
   commands:
   - echo "$DOCKER_USERNAME"
-  - docker login "docker.zvon.tech" --username "$DOCKER_USERNAME" --password "$DOCKER_PASSWORD"
+  - docker login "docker.zvon.tech" --username "$DOCKER_USERNAME" --password "$DOCKER_PASSWORD"
+  - docker buildx create --use
+  - docker buildx build -f Dockerfile -t "docker.zvon.tech/lunch-go:${DRONE_TAG}" --platform linux/amd64,linux/arm64 --push .
+
+services:
+- name: docker
+  image: docker:dind
+  privileged: true
+  volumes:
+  - name: dockersock
+    path: /var/run
+
+volumes:
+- name: dockersock
+  temp: {}
+
+trigger:
+  event:
+  - tag