ci: add automation

.drone.yml

@@ -0,0 +1,17 @@
+kind: pipeline
+type: docker
+name: build
+steps:
+  - name: image
+    image: plugins/docker
+    settings:
+      registry: git.supanadit.com
+      repo: git.supanadit.com/supanadit/${DRONE_REPO_NAME}
+      tags: ${DRONE_TAG}
+      username:
+        from_secret: DRONE_PUBLISH_USER
+      password:
+        from_secret: DRONE_PUBLISH_KEY
+trigger:
+  ref:
+    - refs/tags/*