bump action/checkout v4 in README #40
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| name: Docker Image CI | |
| on: | |
| push: | |
| branches: | |
| - master | |
| pull_request: | |
| jobs: | |
| build: | |
| runs-on: ubuntu-latest | |
| steps: | |
| - uses: actions/checkout@v4 | |
| - name: Build the Docker image | |
| run: docker build . --file Dockerfile --tag ${{ github.repository }}:$(date +%s) |