Improve folder access admin dashboard

.github/workflows/docker-build.yml

@@ -6,6 +6,7 @@ on:
 
 env:
   REGISTRY: git.mischlabs.de
+  REGISTRY_USER: MrDiderot
   REGISTRY_IMAGE: git.mischlabs.de/mrdiderot/photography
 
 jobs:
@@ -44,13 +45,12 @@ jobs:
       - name: Log in to Gitea Package Registry
         shell: sh
         run: |
-          if [ -z "${{ secrets.REGISTRY_USER }}" ] || [ -z "${{ secrets.REGISTRY_TOKEN }}" ]; then
-            echo "Missing registry credentials."
-            echo "Create repository secrets REGISTRY_USER and REGISTRY_TOKEN."
+          if [ -z "${{ secrets.REGISTRY_TOKEN }}" ]; then
+            echo "Missing REGISTRY_TOKEN secret."
             echo "REGISTRY_TOKEN must be a Gitea access token with package write permission."
             exit 1
           fi
-          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login "${{ env.REGISTRY }}" -u "${{ secrets.REGISTRY_USER }}" --password-stdin
+          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login "${{ env.REGISTRY }}" -u "${{ env.REGISTRY_USER }}" --password-stdin
 
       - name: Build and push Docker image
         shell: sh