ci: remove github workflow

.github/workflows/docker-image.yml

@@ -1,33 +0,0 @@
-name: Docker Image CI
-
-on:
-  push:
-    branches: [ "master" ]
-    paths-ignore:
-      - 'README.md'
-  # pull_request:
-  #   branches: [ "master" ]
-  #   paths-ignore:
-  #     - 'README.md'
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-
-  build:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set Environment
-      run: |
-        echo "SLUG=ghcr.io/cwpearson/ytdlp-site" >> $GITHUB_ENV
-        echo "DATE=$(date +"%Y%m%d_%H%M")" >> $GITHUB_ENV
-    - name: Build the Docker image
-      run: docker build . --file Dockerfile --build-arg GIT_SHA=$(git rev-parse HEAD) --tag "$SLUG:$DATE" --tag "$SLUG:latest"
-    - name: Publish to GHCR
-      run: |
-        echo '${{secrets.GHCR_TOKEN}}' | docker login ghcr.io -u cwpearson --password-stdin
-        docker push "$SLUG:latest"
-        docker push "$SLUG:$DATE"