add ci

.drone.yml

@@ -0,0 +1,15 @@
+kind: pipeline
+name: build
+
+steps:
+  - name: docker
+    image: plugins/docker
+    settings:
+      register: docker.mtfos.xyz
+      repo: docker.mtfos.xyz/mtfos/geoip
+      dockerfile: Dockerfile
+      tags: [latest, "${DRONE_COMMIT}"]
+
+trigger:
+  branch:
+    - master