Add automated tests for CI process

.gitlab-ci.yml

@@ -10,6 +10,7 @@ stages:
   - analyse
   - build
   - test
+  - cleanup_test
   - tag
   - deploy
 
@@ -19,6 +20,23 @@ build:
     - podman build --pull -t "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG" .
     - podman push "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG"
 
+test:
+  stage: test
+  script:
+    - curl -L https://github.com/hetznercloud/cli/releases/download/v1.16.2/hcloud-linux-amd64.tar.gz |  tar -zxv hcloud
+    - sha256sum -c <(echo "a517c1362edd3c6374c1dd12ba58e3fe89d67ec7db37b12aa5b904d409182d25  hcloud")
+    - podman run -e CI_HETZNER_KEY --entrypoint /bin/bash "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_SLUG" -c 'docker-machine create --driver hetzner --hetzner-image="debian-10" --hetzner-server-type="cx11" --hetzner-api-token="$CI_HETZNER_KEY"  ci-test-machine && docker-machine ls; docker-machine rm -y ci-test-machine'
+
+cleanup_test:
+  image: docker.io/library/ubuntu:19.04
+  stage: cleanup_test
+  script:
+    - apt-get update
+    - apt-get install -y hcloud-cli
+    - HCLOUD_TOKEN="$CI_HETZNER_KEY" ./hcloud server delete ci-test-machine || exit 0
+    - HCLOUD_TOKEN="$CI_HETZNER_KEY" ./hcloud ssh-key delete ci-test-machine || exit 0
+  when: on_failure
+
 tagging-master:
   stage: tag
   script: