Merge branch '3-publish-docker-image' into 'main'

Resolve "Publish docker image"

Closes #3

See merge request hectorjsmith/fail2ban-prometheus-exporter!11

.gitlab-ci.yml

@@ -35,3 +35,20 @@ build:
       - dist/*.tar.gz
       - dist/checksums.txt
     expire_in: 1 day
+
+docker-gitlab:
+  stage: build
+  only:
+    - main
+    - tags
+  image: docker:stable
+  services:
+    - docker:dind
+  before_script:
+    - apk add git
+    - apk add make
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+  script:
+    - make docker/build-latest
+    - make docker/build-tag
+    - docker push registry.gitlab.com/hectorjsmith/fail2ban-prometheus-exporter