Update CI

* Update drone to v1.x
* Add GitHub Actions

cases/ci/travis/demo/.travis.yml

@@ -0,0 +1,16 @@
+language: bash
+
+dist: xenial
+
+services:
+  - docker
+
+before_script:
+  - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
+
+script:
+  - echo "test code"
+
+after_success:
+  - docker build -t username/alpine .
+  - docker push username/alpine