Add workflow file

[newFort4]

on: [push, pull_request]

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v2          

      - uses: game-ci/unity-builder@v2
        env:
          UNITY_LICENSE: ${{ secrets.UNITY_LICENSE }}
        with:
          targetPlatform: StandaloneOSX

      - uses: actions/cache@v2
        with:
          path: .
          key: Library-ZombieTiles-TargetPlatform
          restore-keys: |
            Library-ZombieTiles-
            Library-

      - uses: actions/upload-artifact@v2
        with:
          name: Build
          path: build

      - name: Zip build
        run: |
          pushd build/StandaloneOSX
          zip -r ../../StandaloneOSX.zip .
          popd```