Merge pull request 'Add a step in the CI pipeline to build a container image' (#7) from build-image into master

Reviewed-on: #7

.woodpecker.yaml

@@ -22,3 +22,19 @@ steps:
       - pip_token
     when:
       event: tag
+  publish-image:
+    image: woodpeckerci/plugin-docker-buildx
+    settings:
+      dockerfile: Dockerfile
+      registry: git.snyman.info
+      username: $DOCKER_USERNAME
+      password: $DOCKER_TOKEN
+      repo: git.snyman.info/${CI_REPO_OWNER}/codesmidgen
+      tags:
+        - latest
+        - ${CI_COMMIT_TAG##v}
+    secrets:
+      - docker_username
+      - docker_token
+    when:
+      event: tag