Fix: Convert image names to lowercase for Docker registry compatibility

Problem: Docker/container registries require lowercase image names, but
Gitea CI variables may contain uppercase letters (e.g., repo name)

Solution:
- Use `tr '[:upper:]' '[:lower:]'` to convert $CI_REGISTRY_IMAGE to lowercase
- Convert $CI_COMMIT_REF_NAME (branch name) to lowercase as well
- Apply conversion in both build and deploy stages
- Also fixed deploy stage to use 'app.image' instead of 'api.image' (unified architecture)

This allows using the repo with any case without needing to rename it.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

.gitlab-ci.yml

@@ -7,14 +7,18 @@ build_container:
   stage: build
   image:  deps.global.bsf.tools/quay.io/buildah/stable:latest
   variables:
-    IMAGE_NAME: "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME"
+    # Convert image name to lowercase for Docker registry compatibility
+    IMAGE_NAME_LOWER: ""
   before_script:
     - mkdir -p /tmp/buildah-storage
     - export BUILDAH_ROOT="/tmp/buildah-storage"
     - echo "$CI_REGISTRY_PASSWORD" | buildah login -u "$CI_REGISTRY_USER" --password-stdin "$CI_REGISTRY"
+    # Convert registry image and branch name to lowercase
+    - export IMAGE_NAME_LOWER=$(echo "$CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME" | tr '[:upper:]' '[:lower:]')
+    - echo "Building image: $IMAGE_NAME_LOWER"
   script:
-    - buildah bud --build-arg NPM_REGISTRY=https://deps.global.bsf.tools/artifactory/api/npm/registry.npmjs.org/ --storage-driver vfs --isolation chroot -t $IMAGE_NAME .
-    - buildah push --storage-driver vfs $IMAGE_NAME
+    - buildah bud --build-arg NPM_REGISTRY=https://deps.global.bsf.tools/artifactory/api/npm/registry.npmjs.org/ --storage-driver vfs --isolation chroot -t $IMAGE_NAME_LOWER .
+    - buildah push --storage-driver vfs $IMAGE_NAME_LOWER
 
 deploy_helm_charts:
   stage: deploy
@@ -34,12 +38,16 @@ deploy_helm_charts:
         # ONLY: ["branches", "!main"]
   script:
     - kubectl config use-context $CONTEXT
+    # Convert image names to lowercase for Docker registry compatibility
+    - export IMAGE_REPO_LOWER=$(echo "$CI_REGISTRY_IMAGE" | tr '[:upper:]' '[:lower:]')
+    - export IMAGE_TAG_LOWER=$(echo "$CI_COMMIT_REF_NAME" | tr '[:upper:]' '[:lower:]')
+    - echo "Deploying with image: $IMAGE_REPO_LOWER:$IMAGE_TAG_LOWER"
     - |
       helm upgrade --install warehouse13-$CI_COMMIT_REF_NAME \
       ./helm/warehouse13 --namespace $NAMESPACE \
       -f $VALUES_FILE \
-      --set api.image=$CI_REGISTRY_IMAGE \
-      --set api.image.tag=$CI_COMMIT_REF_NAME \
+      --set app.image.repository=$IMAGE_REPO_LOWER \
+      --set app.image.tag=$IMAGE_TAG_LOWER \
       --set postgres.image.repository=containers.global.bsf.tools/postgres \
       --set postgres.image.tag=15-alpine \
       --set minio.image.repository=containers.global.bsf.tools/minio \