fix: remove reusable workflow

https://code.forgejo.org/forgejo/runner/issues/63

.forgejo/workflows/docker.yml

@@ -6,7 +6,7 @@ on:
       - "main"
 
 env:
-  REGISTRY: code.troylusty.com
+  REGISTRY: code.threepop.com
   IMAGE_NAME: ${{ github.repository }}
 
 permissions:
@@ -14,13 +14,8 @@ permissions:
   contents: read
 
 jobs:
-  run-tests:
-    uses: ./.forgejo/workflows/test.yml
-
   build-and-push-image:
-    runs-on: ubuntu-latest
-    needs:
-      - run-tests
+    runs-on: nixos-x86_64-linux
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4