[main]: fix package name again

.gitea/workflows/docker.yaml

@@ -5,9 +5,6 @@ on:
     branches: [ "main" ]
   workflow_dispatch:
 
-env:
-  IMAGE_NAME: gitea.umbra.mom/ciaran/football_competitiveness
-
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -31,7 +28,14 @@ jobs:
           docker buildx inspect --bootstrap
 
       - name: Build and push image
+        env:
+          REGISTRY_USER: ${{ secrets.REGISTRY_USER }}
+          REGISTRY_NAMESPACE: ${{ secrets.REGISTRY_NAMESPACE }}
         run: |
+          set -eu
+          NAMESPACE="${REGISTRY_NAMESPACE:-$REGISTRY_USER}"
+          IMAGE_NAME="gitea.umbra.mom/${NAMESPACE}/football_competitiveness"
+          echo "Publishing image: ${IMAGE_NAME}:latest"
           docker buildx build \
             --pull \
             --platform linux/amd64 \