Reapply "removed ci"

This reverts commit cb073e987e.

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

@@ -1,33 +0,0 @@
-name: Build Silverblue Image
-
-on:
-  schedule:
-    - cron: '0 0 * * *'
-  push:
-    branches:
-      - main
-
-jobs:
-  build-push:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout code
-        uses: actions/checkout@v2
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v1
-
-      - name: Login to Gitea registry
-        uses: docker/login-action@v2
-        with:
-          registry: git.joshua-se.com
-          username: ${{ secrets.REGISTRY_USERNAME }}
-          password: ${{ secrets.REGISTRY_PASSWORD }}
-
-      - name: Build Image
-        run: |
-          docker build -f Containerfile -t git.joshua-se.com/joshuase96/silverblue-custom:latest .
-
-      - name: Push Image
-        run: |
-          docker push git.joshua-se.com/joshuase96/silverblue-custom:latest