chore: add artifacthub repo config

.drone.yml

@@ -42,9 +42,10 @@ steps:
     commands:
       - helm dependency update
       - helm package .
-      - curl --user "frederick:$HELM_PASSWORD" -X POST --upload-file vikunja-*.tgz https://kolaente.dev/api/packages/vikunja/helm/api/charts
+      - echo $${HELM_PASSWORD} | helm registry login -u frederick --password-stdin kolaente.dev/vikunja
+      - helm push vikunja-*.tgz oci://kolaente.dev/vikunja   
 ---
 kind: signature
-hmac: 993135e828384d9938343750ed3164c2ae702b87118d28b74ae3e1f522403f61
+hmac: 0f07e164aa169160b10e2813884d8de17a207ac10d4b3f03026e0a9a175acb83
 
 ...

artifacthub-repo.yml

@@ -1 +1,9 @@
-repositoryID: 14bd8402-9829-4f9b-b71e-e496fc1307f5
+# Artifact Hub repository metadata file
+# https://artifacthub.io/docs/topics/repositories/helm-charts/#oci-support
+# publish via:
+# oras push kolaente.dev/vikunja/vikunja:artifacthub.io --config artifacthub.config.json:application/vnd.cncf.artifacthub.config.v1+yaml artifacthub-repo.yml:application/vnd.cncf.artifacthub.repository-metadata.layer.v1.yaml
+repositoryID: 14bd8402-9829-4f9b-b71e-e496fc1307f5
+owners: # (optional, used to claim repository ownership)
+  - name: kolaente
+    email: artifacthub@kolaente.de
+

artifacthub.config.json

@@ -0,0 +1 @@
+{}