Add hugo image.

.gitlab-ci.yml

@@ -72,3 +72,20 @@ push-docker:
   needs:
     - job: build-docker
       artifacts: true
+
+# hugo image:
+
+build-hugo:
+  extends: .container-build
+  variables:
+    CONTEXT: images/hugo
+
+push-hugo:
+  extends: .container-push
+  variables:
+    CONTEXT: images/hugo
+    IMAGE: ci-images
+    TAG: hugo
+  needs:
+    - job: build-hugo
+      artifacts: true

images/hugo/.dockerignore

+*

images/hugo/Dockerfile

+FROM registry.hub.docker.com/library/alpine:3.14
+# hadolint ignore=DL3018
+RUN apk add --no-cache --update hugo && \
+    hugo version