chore: remove unused .gitlab-ci.yml

No longer needed after migration to Gitea Actions.

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

Dockerfile

@@ -1,4 +1,4 @@
-FROM amd64/nginx:1.29.4@sha256:14c54109a4bff01b4163013fc9509e7f097691c8484f5f0c6772d937c0a75a16
+FROM amd64/nginx:1.29.4@sha256:1ead684dc0a33ef421caa42403272afeae59c8933edcedda6926d964a44d3f01
 MAINTAINER Joakim Olsson <joakim@unbound.se>
 
 ADD files/*.html files/*.jpg files/*.mp3 /usr/share/nginx/html/

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: