Move nightly builds to dedicated branch

.github/workflows/docker-nightly.yml

@@ -1,27 +0,0 @@
-name: Docker Nightly Build
-on:
-  schedule:
-    - cron: '22 12 * * *'
-
-jobs:
-  docker:
-    runs-on: ubuntu-latest
-    steps:
-      -
-        name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
-      -
-        name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
-      -
-        name: Login to Docker Hub
-        uses: docker/login-action@v2
-        with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-      -
-        name: Build and push
-        uses: docker/build-push-action@v4
-        with:
-          push: true
-          tags: atinoda/text-generation-webui:nightly