chore: remove unused .gitlab-ci.yml

No longer needed after migration to Gitea Actions.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitlab-ci.yml

@@ -1,22 +0,0 @@
-stages:
-  - build
-  - deploy-prod
-
-image: buildtool/build-tools:${BUILDTOOLS_VERSION}
-
-build:
-  stage: build
-  script:
-    - build
-    - push
-
-deploy-to-prod:
-  stage: deploy-prod
-  when: on_success
-  script:
-    - echo Deploy to PROD.
-    - deploy prod
-  environment:
-    name: prod
-  only:
-    - master

k8s/deploy.yaml

@@ -44,7 +44,7 @@ spec:
           periodSeconds: 5
           timeoutSeconds: 5
         imagePullPolicy: Always
-        image: oci.unbound.se/unboundsoftware/lingonpaj-site:${COMMIT}
+        image: oci.unbound.se/unboundsoftware/lingonpaj-site@sha256:4af64942ba74210a4db65c7b8ab3fbf138eeef87c30084de855a524052f16a7e:${COMMIT}
         ports:
         - containerPort: 80
         resources: