feat: add actions/cache support

[aweris]

Introduces a backend service required to support actions/cache custom action

workflow for the gif:

on: push

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/cache@v3
        id: cache
        with:
          path: hello.txt
          key: ${{ runner.os }}-hello.txt
          restore-keys: |
            ${{ runner.os }}-hello.txt
            ${{ runner.os }}-

      - name: Create hello.txt
        if: steps.cache.outputs.cache-hit != 'true'
        run: echo "Hello World ${{ github.run_id }}" > hello.txt

      - name: Print hello.txt
        run: cat hello.txt