Add drone CI

.drone.yml

@@ -0,0 +1,26 @@
+---
+kind: pipeline
+type: docker
+name: default
+
+platform:
+  os: linux
+  arch: arm
+
+steps:
+  - name: build
+    image: python:alpine
+    commands:
+      - pip install --no-cache-dir -r requirements.txt
+      - pip install .
+
+  - name: docker
+    image: plugins/docker
+    settings:
+      repo: nemunaire/nemubot
+      auto_tag: true
+      auto_tag_suffix: ${DRONE_STAGE_OS}-${DRONE_STAGE_ARCH}
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password