Fix Evol testbed image workflows

.gitea/workflows/build-ci-image.yml

@@ -8,6 +8,10 @@ on:
       - .gitea/workflows/build-ci-image.yml
   workflow_dispatch:
 
+env:
+  REGISTRY_HOST: git.neosisyphus.com
+  REGISTRY_IMAGE: git.neosisyphus.com/evol3d/evol-testbed
+
 jobs:
   image:
     runs-on: ubuntu-latest
@@ -17,7 +21,7 @@ jobs:
 
       - name: Log in to container registry
         run: |
-          echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login "${{ vars.REGISTRY_HOST }}" \
+          echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login "$REGISTRY_HOST" \
             -u "${{ secrets.REGISTRY_USERNAME }}" \
             --password-stdin
 
@@ -27,11 +31,11 @@ jobs:
             --build-arg BASE_IMAGE=catthehacker/ubuntu:act-latest \
             --build-arg LLVM_VERSION=22 \
             --build-arg MESON_VERSION=latest \
-            -t "${{ vars.REGISTRY_IMAGE }}:latest" \
-            -t "${{ vars.REGISTRY_IMAGE }}:clang22" \
+            -t "$REGISTRY_IMAGE:latest" \
+            -t "$REGISTRY_IMAGE:clang22" \
             -f ci/Dockerfile .
 
       - name: Push CI image
         run: |
-          docker push "${{ vars.REGISTRY_IMAGE }}:latest"
-          docker push "${{ vars.REGISTRY_IMAGE }}:clang22"
+          docker push "$REGISTRY_IMAGE:latest"
+          docker push "$REGISTRY_IMAGE:clang22"