add travis check

.travis.yml

@@ -0,0 +1,29 @@
+---
+# OS Details
+os: linux
+language: python
+python: '3.8'
+
+cache:
+  pip: true
+
+# Install ansible and ansible-lint
+install:
+  - pip install ansible
+  - pip install ansible-lint
+
+# testing galaxy install and ansible lint
+# more advanced testing is currently handled with
+#  github actions. The gh-actions for our test are there:
+#  https://github.com/roles-ansible and are tagged
+#  with 'github-actions'  --> https://github.com/search?q=topic%3Agithub-actions+org%3Aroles-ansible&type=Repositories 
+script:
+  - ansible-galaxy install do1jlr.ranger
+  - ansible-lint .
+  - echo -e "\n\n\n\n\nWe use github actions for more detailed tests.\n\nMore details about that in our github repo at:\nhttps://github.com/chaos-bodensee/role_akku_warning/actions\n\n\n\n\n\n"
+
+notifications:
+  email:
+    on_success: never
+    on_failure: always
+  webhooks: https://galaxy.ansible.com/api/v1/notifications/